raspopov - 2018-10-26

SageThumbs installs as 2 binaries to C:\Program Files (x86)\SageThumbs\32\SageThumbs.dll (32-bit version) and to C:\Program Files (x86)\SageThumbs\64\SageThumbs.dll (64-bit version). You need to unregister (i.e. run: regsvr32.exe /u "C:\Program Files (x86)\SageThumbs\32\SageThumbs.dll" and regsvr32.exe /u "C:\Program Files (x86)\SageThumbs\64\SageThumbs.dll" respectively) and delete both, this is what an uninstaller does for you.