Hey there.
Actually I just picked this up again last week and attempted to update things for VS 2019. I also found I had to manually run the template processor, don’t recall having to previously but it was a while back so not sure.
I was mainly looking into the Blueprint debug visualizers so didn’t look much at the code generators. I’ll try to look at it this week or next. I wonder if the dropdown problem may just be a styling thing?
There have been some major changes to the VS extension architecture for certain component types, which make updating the debug visualizer a big job. Anyway I’ll post again here once I’ve had chance to tidy up my changes and push to Github.
You didn’t run into any issues with assembly references and Nuget? I seem to have problems with them every time I try to update the thing.