We dropped some legacy upgrade code in 8.0 - you should be able to import the .vwin files into a 7.9 Designer, then export them as 7.9 .proj files, and import those into 8.0. It’s not ideal, but minimizing the number of possible inputs lets us simplify our code (and eliminate a lot of bugs).
Generally speaking, in this specific case, the ‘Click to Graph’ files are replaceable with the ‘Ad-Hoc Trending’ template created by our sales engineering department that’s available via the Cloud Template Browser in the designer.