Just to be clear, those reports refer to earlier versions of Uninstalr which had some rare accuracy problems but even in those cases, all the issues could have been prevented by following the instructions the program gives to carefully review the data before proceeding with the uninstallation.
Uninstalr is a powerful tool. If you use power tools without fully knowing what you are doing, there is a risk that you might hurt yourself. That is very unfortunate, and I'm doing my best to make it as safe as possible, but hitting your finger with a hammer can sometimes happen if you are not careful.