The new version of Skent addon has made breaking changes to syntax to avoid conflicts a few hours ago, so I've updated FastWorldReset to match the new syntaxes
this means FastWorldReset will no longer work with older versions of Skent, only Skent 2.0+ to which I really recommend updating as the author has fixed many bugs that I've reported which were appearing with FastWorldReset (but I had designed it to go around the bugs, so it wasn't critical, just spammy console)
(I've only tested if the world resets once with this update, I didn't test further, but hopefully it's stable)
I've also added a new optional argument to /fwr create command, you can now specify world generator in process of creation, so you don't have to specify it later with /fwr generator