I have been trying to use PollyMc but I can't really figure it out. So I launched minecraft after adding an offline account but it doesn't seem to work after closing the launcher and opening minecraft again. If I have internet it starts to download some library files again and then it does launch minecraft. Do I have to download these files every time I launch minecraft? Could someone point me to a guide or something?

Edit: The Launcher seems to have fixed itself.

What I did.

1. Import an old instance in PollyMC
2. Update it's version (Right click on the instance > Edit > Version then click on change version)
3. Then I launched it online. That downloaded libraries to run minecraft. (Not sure I needed them or not.)
4. Closed PollyMc and then launching offline wouldn't work.

But now it works again magically, both with and without connected to internet.