<disclaimer> I'm a complete noob. Regrowth is the first mod pack I have played and I've only been playing Minecraft for a few months. So, please keep in mind I may not know things you think I "should" know. <disclaimer>
First question, minor. When my Regrowth world opens and there are those messages in the chat bar saying that I should update Botania, or Forgecraft or whichever mod, is there a way to do that? I've attempted to click the links before and I get a message that says I don't have permission to do that... or some such. Is that something you just wait for the mod developers to do?
Real question. When I launched my Regrowth world today I got a message stating that "the backup level.dat" is being used. I assume this is because I was in a hurry when I last logged off and the launcher/ web browser etc. were slower than usual in that moment and I did a forced shut down of my computer-- I pushed the power button until it went off because the cntr/alt/delete function didn't seem to have an effect. So, the message says to do a save but I cannot find a file with a label that matches my regrowth world when I look in the .minecraft file in appdata place, which is what all the tutorials on Google seem to think needs done.
Does that mean my world is already too gone to save?