@themacguru really? I have 3 instances of RapidWeaver 6 on my machine and 2 instances of RapidWeaver 5 and all works great for me here. I believe Realmac has said as long as you name them differently there isn’t a problem.
They are failed updates, they weren’t deleted because the update failed to complete and thus the file wasn’t deleted.
You can remove them without any consequence.
If you’re not sure you can move them into a folder on your desktop and run RW to test everything is working.
In earlier versions of RW 6 some users discovered 20/30/40 of them in there.