Not sure why you are getting those issues with HS2 and not with the other games. Standard recommendations that may help are to name and place the game file directory to something short and as high up as possible, like the following D:\STNHS2DX11\ and to launch via InitSetting.exe
These two simple steps normally solve a lot of in-game problems.
Worth noting we are up to R11 now. Latest versions can be found here
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I'd recommend a fresh install rather than trying to do multiple step upgrades. If you do that I'd also recommend Torrent download and extract using 7-Zip.
Best of luck