Thanks so much for the post @xabier.zaldua ,
just small note about point 1) and 2)
From Rafael: “Hi all, I want to confirm that the resolution provided by @alexanderstieglbauer worked for another customer to successfully uninstall AS and DTM when they were getting errors attempting to uninstall from “Add or Remove Programs”. The Revo Uninstaller Tool free version can be downloaded here: https://www.revouninstaller.com/start-freeware-download/”
DTM Library can not be uninstalled - Ask Questions / B&R Software & Runtime - B&R Community
Ciao
Valerio