10.4 not saving Theme Setting or Installed patches

I'm aware that some people are having issues with 10.4 not showing that Patch 1 or Patch 2 have been installed 

I am getting similar issues, GetIt appears to download and install the files, but Help > About ... > Installed Updates reports no Updates Installed.

Similarly I am having issues with setting Dark Theme as my default

Setting Tools > Options > UI > Theme Manager will set Dark Theme for the current session, but on restarting the IDE the setting resets to "Toggle theme to match Windows.."

Any help?