When trying to activate the plugin by browsing to the updated version of OverlayPlugin.dll in ACT, I got a .NET framework error about something being isolated in a prior version of .NET Framework. I changed my OS language to English to be able to find out what the problem is and relogged to my user account to change it, and when I got back, ACT couldn't start up at all. Deleting the .dll files from the folder that they'd been opened from didn't do anything to my ACT client.
When trying to activate the plugin by browsing to the updated version of OverlayPlugin.dll in ACT, I got a .NET framework error about something being isolated in a prior version of .NET Framework. I changed my OS language to English to be able to find out what the problem is and relogged to my user account to change it, and when I got back, ACT couldn't start up at all. Deleting the .dll files from the folder that they'd been opened from didn't do anything to my ACT client.
This is what ACT looks like after loading: http://imgur.com/FT3GIAS
Reinstalling ACT will probably fix it, but that leaves me with the problem of getting the plugin to work.