Security Update for Internet Explorer Flash Player for Windows 10 Version 1511 for x64-based Systems (KB3132372) kills the RCFORB client. If you experience a blank screen when selecting a station from the lobby list, check to see if your computer has installed this update. Restoring functionality requires uninstalling the Windows Update KB3132372. This only affects the RCFORB client on Windows machines, and possibly only Windows 10 machines. It does not affect the Android client.
Remember, you assume some risk when not installing (or removing) security updates!
The Windows update affected RCForb on Windows 8 and 10 machines. On Windows 7, a standalone Adobe Flash Player update was the culprit, and you need to uninstall Flash Player and then download and install an earlier version. From the remotehams website:
If you have Windows 7 or older, run the Flash Player Uninstaller to remove Flash Player 20:
Now, install Adobe Flash Player 19 Active X Control:
If the option is present, specify “Do not update player”.
In Windows 10, after uninstalling the KB3132372 update, you also need to download a troubleshooting tool from Microsoft that will let you hide the update. Otherwise it will get re-installed, as it did on my W10 machine yesterday, and kill the RCForb client again.
The troubleshooter can be downloaded from: