diff --git a/src/MatrixClientPeg.js b/src/MatrixClientPeg.js
index 04b3b47e43..9a77901d2e 100644
--- a/src/MatrixClientPeg.js
+++ b/src/MatrixClientPeg.js
@@ -23,10 +23,12 @@ import Matrix from 'matrix-js-sdk';
 import utils from 'matrix-js-sdk/lib/utils';
 import EventTimeline from 'matrix-js-sdk/lib/models/event-timeline';
 import EventTimelineSet from 'matrix-js-sdk/lib/models/event-timeline-set';
+import sdk from './index';
 import createMatrixClient from './utils/createMatrixClient';
 import SettingsStore from './settings/SettingsStore';
 import MatrixActionCreators from './actions/MatrixActionCreators';
 import {phasedRollOutExpiredForUser} from "./PhasedRollOut";
+import Modal from './Modal';
 
 interface MatrixClientCreds {
     homeserverUrl: string,
@@ -116,6 +118,14 @@ class MatrixClientPeg {
                 await this.matrixClient.initCrypto();
             }
         } catch (e) {
+            if (e.name === 'InvalidCryptoStoreError') {
+                // The js-sdk found a crypto DB too new for it to use
+                const CryptoStoreTooNewDialog =
+                    sdk.getComponent("views.dialogs.CryptoStoreTooNewDialog");
+                Modal.createDialog(CryptoStoreTooNewDialog, {
+                    host: window.location.host,
+                });
+            }
             // this can happen for a number of reasons, the most likely being
             // that the olm library was missing. It's not fatal.
             console.warn("Unable to initialise e2e: " + e);
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index 572cc0d2b3..06f834503b 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -249,10 +249,11 @@
     "Enable URL previews for this room (only affects you)": "Enable URL previews for this room (only affects you)",
     "Enable URL previews by default for participants in this room": "Enable URL previews by default for participants in this room",
     "Room Colour": "Room Colour",
-    "Pin unread rooms to the top of the room list": "Pin unread rooms to the top of the room list",
     "Pin rooms I'm mentioned in to the top of the room list": "Pin rooms I'm mentioned in to the top of the room list",
+    "Pin unread rooms to the top of the room list": "Pin unread rooms to the top of the room list",
     "Enable widget screenshots on supported widgets": "Enable widget screenshots on supported widgets",
     "Show empty room list headings": "Show empty room list headings",
+    "Show developer tools": "Show developer tools",
     "Collecting app version information": "Collecting app version information",
     "Collecting logs": "Collecting logs",
     "Uploading report": "Uploading report",
@@ -553,6 +554,7 @@
     "Click here to fix": "Click here to fix",
     "To send events of type <eventType/>, you must be a": "To send events of type <eventType/>, you must be a",
     "Upgrade room to version %(ver)s": "Upgrade room to version %(ver)s",
+    "Open Devtools": "Open Devtools",
     "Who can access this room?": "Who can access this room?",
     "Only people who have been invited": "Only people who have been invited",
     "Anyone who knows the room's link, apart from guests": "Anyone who knows the room's link, apart from guests",
@@ -849,6 +851,11 @@
     "Advanced options": "Advanced options",
     "Block users on other matrix homeservers from joining this room": "Block users on other matrix homeservers from joining this room",
     "This setting cannot be changed later!": "This setting cannot be changed later!",
+    "Sign out": "Sign out",
+    "To avoid losing your chat history, you must export your room keys before logging out. You will need to go back to the newer version of Riot to do this": "To avoid losing your chat history, you must export your room keys before logging out. You will need to go back to the newer version of Riot to do this",
+    "You've previously used a newer version of Riot on %(host)s. To use this version again with end to end encryption, you will need to sign out and back in again. ": "You've previously used a newer version of Riot on %(host)s. To use this version again with end to end encryption, you will need to sign out and back in again. ",
+    "Incompatible Database": "Incompatible Database",
+    "Continue With Encryption Disabled": "Continue With Encryption Disabled",
     "Failed to indicate account erasure": "Failed to indicate account erasure",
     "Unknown error": "Unknown error",
     "Incorrect password": "Incorrect password",
@@ -903,7 +910,6 @@
     "Update any local room aliases to point to the new room": "Update any local room aliases to point to the new room",
     "Stop users from speaking in the old version of the room, and post a message advising users to move to the new room": "Stop users from speaking in the old version of the room, and post a message advising users to move to the new room",
     "Put a link back to the old room at the start of the new room so people can see old messages": "Put a link back to the old room at the start of the new room so people can see old messages",
-    "Sign out": "Sign out",
     "Log out and remove encryption keys?": "Log out and remove encryption keys?",
     "Clear Storage and Sign Out": "Clear Storage and Sign Out",
     "Send Logs": "Send Logs",
@@ -927,9 +933,7 @@
     "Username available": "Username available",
     "To get started, please pick a username!": "To get started, please pick a username!",
     "This will be your account name on the <span></span> homeserver, or you can pick a <a>different server</a>.": "This will be your account name on the <span></span> homeserver, or you can pick a <a>different server</a>.",
-    "If you would like to create a Matrix account you can <a>register</a> now.": "If you would like to create a Matrix account you can <a>register</a> now.",
     "If you already have a Matrix account you can <a>log in</a> instead.": "If you already have a Matrix account you can <a>log in</a> instead.",
-    "You are currently using Riot anonymously as a guest.": "You are currently using Riot anonymously as a guest.",
     "You have successfully set a password!": "You have successfully set a password!",
     "You have successfully set a password and an email address!": "You have successfully set a password and an email address!",
     "You can now return to your account after signing out, and sign in on other devices.": "You can now return to your account after signing out, and sign in on other devices.",
@@ -1036,6 +1040,8 @@
     "This Home server does not support communities": "This Home server does not support communities",
     "Failed to load %(groupId)s": "Failed to load %(groupId)s",
     "Couldn't load home page": "Couldn't load home page",
+    "You are currently using Riot anonymously as a guest.": "You are currently using Riot anonymously as a guest.",
+    "If you would like to create a Matrix account you can <a>register</a> now.": "If you would like to create a Matrix account you can <a>register</a> now.",
     "Login": "Login",
     "Failed to reject invitation": "Failed to reject invitation",
     "This room is not public. You will not be able to rejoin without an invite.": "This room is not public. You will not be able to rejoin without an invite.",
@@ -1272,7 +1278,5 @@
     "Import": "Import",
     "Failed to set direct chat tag": "Failed to set direct chat tag",
     "Failed to remove tag %(tagName)s from room": "Failed to remove tag %(tagName)s from room",
-    "Failed to add tag %(tagName)s to room": "Failed to add tag %(tagName)s to room",
-    "Open Devtools": "Open Devtools",
-    "Show developer tools": "Show developer tools"
+    "Failed to add tag %(tagName)s to room": "Failed to add tag %(tagName)s to room"
 }