Hi,
Have you read the NonVisual Plugins (.NET 5+) article ?
Just checked - 6.6.0.1309 is correctly installed to GAC.
we ship nuget package - C:\Program Files (x86)\RemObjects Software\Packages\RemObjects.Hydra.6.6.0.1309.nupkg
. it contains all required dll for .NET 5+ plugins.
Check this example -
testcase.zip (17.8 KB)
Note: it uses .NET 6 because .NET 5 in VS2022 is deprecated but you can easily change it to .NET 5 if you are using VS2019.