Hi.., I have it working now. GOverlay 1.5.6 in combination with HWiNFO64 5.52(3161)
There is one issue still though, the plugins still don't show up in the Plugins Menu. So after starting GOverlay I'm litterally see nothing listed in there. The logfile only mentions to look for plugins. But doesn't mention an error finding or just finding plugins.
What I've done now to get it working is downloading the HWiNFO plugin from from the topic on this forum and follow the installation instructions that come with it. This still doesn't show any plugin when running GOverlay. Fortunately I still had an old copy of GOverlay 1.4.2 and copied the plugin files from there into the folder of 1.5.6 And so now the HWiNFO plugin shows up. And also now works ofcouse.
So thank you very much for the quick fix.
For your, or other peoples convenience, I'll attach the 2 files I mentioned taking from 1.4.2 which do make the plugin show up in GOverlay for me.
*edit*: Just want to mention that I run GOverlay constantly as administrator.