Hello everyone, I've been working on a CP map and upon finishing Red's side and copying it to prepare for reskinning to create Blu's side I kept running into problems. Whenever hammer crashed and I had to reload the save, I received a message saying there were invalid solids and whether or not Hammer should resave with said solids removed. If I clicked Yes, Hammer crashed and upon reload, the map had no entities whatsoever. If I clicked no, Hammer crashed and the map again couldn't be loaded. I had a backup before copying the Red side, so I loaded it and recopied+reskinned everything. I knew when I reloaded this save I would get the problem again, so I did some research and discovered the Alt+P trick to remove the solids before reloading. Well, while I was fixing one of the invalid solids, Hammer crashed, and now I have no way to remove them without destroying my entities. I understand this is a new bug, and that apparently you can load the map in an old version of SDK to fix this. How can I fix this, or get an older version?