When you opened Adrift5, did you see a character with a blue icon that said "Player"? If not, you might not have the standard library. Click on the Adrift Developer logo in the upper left, then click on settings, and then choose the libraries tab and tell me whats in there.
I never used 3.9, and its been a long time since I've used version 4, so I can't help you with those. Version 4 is not freeware, so it will have task/object/etc. limitations unless you paid for it.