What you see are aliases to commands that have been installed by the plug-in - that does not necessarily mean the plug in is still/currently installed unfortunately, just that it was sometime in the past and the aliases are still there.
I don’t think Boltgen is being actively maintained, but I may be mistaken on that.
In any case, now it doesn’t work anymore! Can’t wait for Rhino V9 because V8 is full of unpleasant surprises a little gradually (at least under Mac since the upgrade to a similarity with the windows system)… for now I’m going to do without boltgen which has removed itself with the latest update.