Found an odd issue. On my desktop, none of the open file dialogs seem to do anything. This includes the Open..., Save as..., command and working directory '...' buttons, and the source file->Open button. Clicking them just has no effect.
This is with Windows 10 Enterprise Version 1803. OS Build 17134.1069
It seems to be something specific to the computer, as it works fine on my laptop. I tried on all the available releases (0_2_8_4 through to 0_2_9_0), and seems to happen on all of them. Deleting the %appdata%/Roaming/remedybg directory, doesn't fix the issue either.