I didn't know that you can only have either mods (forge) or plugins. I installed the multiverse plugin and uploaded two new worlds, mlg and myworld, in addition to my main world and the corresponding nether and end worlds. I then installed a mod using forge, which undo-ed the multiverse plugin and instead of reverting the worlds back to the main world, nether, and end, it appears to have replaced nether and end worlds with the two new worlds I had uploaded. I'm scared of trying out going through the nether portal now, like what would happen? Would it break everything? How do I get the two dimensions back?
I have a downloaded backup for the nether, but not the most recent. I don't have one for the end. I really don't want to lose the things I did in them!
Also I have a lot of backups from aternos itself. Will reverting to a backup before this mod help? Is there a better solution?