Toolbox cannot update IDEA 2018.3.5 to 2019.2: size mismatch

I currently have IDEA Ultimate 2018.3.5 installed on my Windows PC (which I don't use for development that often).

I have an All Products Pack subscription and use Jetbrains Toolbox to manage my installations.

Toolbox suggests to update IDEA to 2019.2, so I clicked the button, and get the same error every time:

Logs:

1.15.5666 15708 2019-07-24T20:29:05.958 INFO  AutoUpdateManager    90     Autoupdating "IntelliJ IDEA Ultimate 2018.3.5" from "ch-0"
1.15.5666 15708 2019-07-24T20:29:13.491 DEBUG DownloadAction       158    Download Response: https://download.jetbrains.com/~urlswitch/idea/IU-183.6156.11-191.7479.19-patch-win.jar?fromJetBrainsToolbox , response: 200 ( Content-Type: binary/octet-stream, Content-Length: 242319526, Connection: keep-alive, Date: Wed, 24 Jul 2019 17:02:57 GMT, Last-Modified: Tue, 28 May 2019 09:37:37 GMT, ETag: "097a8afb94fa318fed483565f389cc3c-29", Accept-Ranges: bytes, Server: AmazonS3, Age: 5175, X-Cache: Hit from cloudfront, Via: 1.1 71dbd5706c5b0c7b733248e1171f2d4f.cloudfront.net (CloudFront), X-Amz-Cf-Pop: FRA2-C2, X-Amz-Cf-Id: W_ZOdmiR3EZoNfmRM2S722IciCliMJdqLlKf9YA7_30x02G3Z092rQ== )
1.15.5666 15708 2019-07-24T20:29:13.492 INFO  DownloadAction       101    Finished request "https://download.jetbrains.com/~urlswitch/idea/IU-183.6156.11-191.7479.19-patch-win.jar?fromJetBrainsToolbox" size: 242319526
1.15.5666 15708 2019-07-24T20:29:16.102 INFO  ApplicationPackageVe 64     Correct checksum for "C:/Users/remco/AppData/Local/Temp/Toolbox-DOCyBh\\download.temp-patch2" expect "5c68699655a9f8633b48f658d7bac5120ce8231b25ee2262e7c67eddb49061e0" got "5c68699655a9f8633b48f658d7bac5120ce8231b25ee2262e7c67eddb49061e0"
1.15.5666 15708 2019-07-24T20:29:16.103 DEBUG ApplicationInstaller 221    Downloading  [ patch app "IDEA-U"  "191.7479.19" -> "192.5728.98" ]
1.15.5666 15708 2019-07-24T20:29:16.104 DEBUG ApplicationInstaller 52     Creating download action for url "https://download.jetbrains.com/~urlswitch/idea/IU-191.7479.19-192.5728.98-patch-jbr11-win.jar?fromJetBrainsToolbox"
1.15.5666 15708 2019-07-24T20:29:16.104 INFO  ApplicationInstaller 54     ApplicationInstallerAction : will install application  [ patch app "IDEA-U"  "191.7479.19" -> "192.5728.98" ]
1.15.5666 15708 2019-07-24T20:29:16.110 DEBUG Downloader           123    Temporary file at "C:/Users/remco/AppData/Local/Temp/Toolbox-DOCyBh\\download.temp-patch3" open true writable true
1.15.5666 15708 2019-07-24T20:29:16.111 INFO  DownloadAction       87     Started request "https://download.jetbrains.com/~urlswitch/idea/IU-191.7479.19-192.5728.98-patch-jbr11-win.jar?fromJetBrainsToolbox"
1.15.5666 15708 2019-07-24T20:29:16.131 INFO  DownloadAction       24     "https://download.jetbrains.com/~urlswitch/idea/IU-191.7479.19-192.5728.98-patch-jbr11-win.jar?fromJetBrainsToolbox" redirects to QUrl("https://download-cf.jetbrains.com/idea/IU-191.7479.19-192.5728.98-patch-jbr11-win.jar")
1.15.5666 15708 2019-07-24T20:29:27.784 DEBUG DownloadAction       158    Download Response: https://download.jetbrains.com/~urlswitch/idea/IU-191.7479.19-192.5728.98-patch-jbr11-win.jar?fromJetBrainsToolbox , response: 200 ( Content-Type: binary/octet-stream, Content-Length: 337184685, Connection: keep-alive, Date: Wed, 24 Jul 2019 17:14:03 GMT, Last-Modified: Wed, 24 Jul 2019 17:10:19 GMT, ETag: "a81d31ad4e2abd775107ef04ef604d04-41", Accept-Ranges: bytes, Server: AmazonS3, Age: 4519, X-Cache: Hit from cloudfront, Via: 1.1 71dbd5706c5b0c7b733248e1171f2d4f.cloudfront.net (CloudFront), X-Amz-Cf-Pop: FRA2-C2, X-Amz-Cf-Id: eGPfWbU1fU8wEIVs4_F3NFj_NrPg1kJcFU5tG-sKMVEZ4PZl_d62Ug== )
1.15.5666 15708 2019-07-24T20:29:27.800 INFO  DownloadAction       101    Finished request "https://download.jetbrains.com/~urlswitch/idea/IU-191.7479.19-192.5728.98-patch-jbr11-win.jar?fromJetBrainsToolbox" size: 337184685
1.15.5666 15708 2019-07-24T20:29:27.994 INFO  HandlerGUIWindows    19     WM_ACTIVATE: deactivated
1.15.5666 15708 2019-07-24T20:29:27.995 INFO  CEFMainWindowImpl    264    Hide window signal
1.15.5666 15708 2019-07-24T20:29:27.996 DEBUG HandlerGUIWindows    103    onHideWindow
1.15.5666 15708 2019-07-24T20:29:28.001 INFO  HandlerGUIWindows    25     WM_KILLFOCUS: deactivated
1.15.5666 15708 2019-07-24T20:29:28.062 WARN  ApplicationInstaller 227    Downloading  [ patch app "IDEA-U"  "191.7479.19" -> "192.5728.98" ] failed"Verification error: Downloaded file size mismatch. Expected: 337184691 actual: 337184685"
1.15.5666 15708 2019-07-24T20:29:28.209 ERROR ApplicationInstaller 126    Failed to apply patches. "Downloading patch failed. Verification error: Downloaded file size mismatch. Expected: 337184691 actual: 337184685" [ patch-sequence:  base  local app "IDEA-U" version "2018.3.5" build "183.5912.21" channel "ch-0", patches: ([ patch app "IDEA-U"  "183.5912.21" -> "183.6156.11" ], [ patch app "IDEA-U"  "183.6156.11" -> "191.7479.19" ], [ patch app "IDEA-U"  "191.7479.19" -> "192.5728.98" ]) ]
1.15.5666 15708 2019-07-24T20:29:28.210 ERROR ApplicationManager_a 222    "Downloading patch failed. Verification error: Downloaded file size mismatch. Expected: 337184691 actual: 337184685"