Only show modal if current version is newer + save as last used version

package.json

@@ -94,6 +94,7 @@
     "rxjs-compat": "^6.1.0",
     "secp256k1": "3.3.1",
     "semaphore": "^1.1.0",
+    "semver": "^5.5.0",
     "smooth-scrollbar": "^8.2.7",
     "source-map": "0.7.3",
     "source-map-support": "^0.5.4",

src/components/UpdateNotifier/UpdateInstalled.js

@@ -2,14 +2,18 @@
 
 import { PureComponent } from 'react'
 import { connect } from 'react-redux'
+import semver from 'semver'
 
 import { openModal } from 'reducers/modals'
-import { MODAL_RELEASES_NOTES } from 'config/constants'
 import { lastUsedVersionSelector } from 'reducers/settings'
+import { saveSettings } from 'actions/settings'
+import { MODAL_RELEASES_NOTES } from 'config/constants'
+
 import type { State } from 'reducers'
 
 type Props = {
   openModal: Function,
+  saveSettings: Function,
   lastUsedVersion: string,
 }
 
@@ -19,14 +23,18 @@ const mapStateToProps = (state: State) => ({
 
 const mapDispatchToProps = {
   openModal,
+  saveSettings,
 }
 
 class UpdateInstalled extends PureComponent<Props> {
   componentDidMount() {
-    const { lastUsedVersion, openModal } = this.props
+    const { lastUsedVersion, openModal, saveSettings } = this.props
     const currentVersion = __APP_VERSION__
 
-    openModal(MODAL_RELEASES_NOTES, `${lastUsedVersion} -> ${currentVersion}`)
+    if (semver.gt(currentVersion, lastUsedVersion)) {
+      openModal(MODAL_RELEASES_NOTES, `${lastUsedVersion} -> ${currentVersion}`)
+      saveSettings({ lastUsedVersion: currentVersion })
+    }
   }
 
   render() {