I think your program folder has a bunch of folders that were not deleted.
Shaders are stored in a single zip file, because it takes a long time to download hundreds of individual files. At one point, I accidentally uploaded a zip file for all the shaders that did not contain a Shaders/ subfolder. This caused a bunch of shader files to be extracted into the template base folder.
I fixed the mistake, but it looks like you still have the files in your Ultra Engine/Templates/Common folder and reinstalling that version did not delete them, so you will need to delete them manually. I bet if you uninstall again you will see that they are still there.
I assume this is on the dev channel?