I haven't figured it out yet for the theme. But I did use a Contrast Theme in Windows so I could see stuff and get it added. I need to figure out the theme issue, because when i remove the contrast theme.... I get this.....
I can't read it, but the toggles in the dock are there. So right now as long as I know which is which..... I'm good. The buttons all work (left is properties and right is Filters). All the pop ups work and look right, only the dock colors are not legible.
Note: I think plugins being in Prism Live is fairly new. I don't know when the update popped but now you can drop obs plugins into it. User>AppData>Local>PrismLiveStudio and you just drop the folders to install like with regular OBS