Thanks Drakenite, good to know it is not just me / my set-up!

Your assessment seems very likely. I tried Alt+Tab and could not find a missing dialogue box / pop-up menu.

Not certain if this is relevant, but I have two screens and multiple portable installations of MMW in separate folders (4-1919 + 5-2316 + 5-2325 + 5-2326) and two "normal" installations (MMW4 1919 + MMW5 2326 from 2325).

Thanks, I can reproduce on 2326. I think it's related to an existing issue, https://www.ventismedia.com/mantis/view.php?id=17570.

After installing an Add-On to the latest version, the Addons screen appears to be locked in focus but does not accept input e.g. minimise / maximise / close icon / close button / Add / Find Updates.

Right clicking the TaskBar icon to Close Window does not work either.

This behaviour is different to the previous 2325 version.

This is with a Portable installation. Had to use End Task from Task Manager to kill the application. I think the Add-On installed.

May be related, but when the Find Updates was used, the Show Links (1.0.1) had a download button for 1.0.4. Pressing update resulted in the "circle" hour glass running and similar locked screen. Re-opening MMW5 after Ending the Task(s) then showed Show Links 1.0.4 - so it looks like it did install.