I have blueprints of mods like void power and warehouses from past games we've played and it handled it fine. When you import the string it gives and error but the bps still import. I don't think I have any bob/angels bps. You might have to selectively dump some in game in 1.1.45 then try it again.

Thanks kevin, Just to clarify the problem then because I've been freely going up and down the version ladder for the last six months without incident to my blueprints. Some of us play multiplayer long maps and the great advance of 'fast releases' means mods don't/can't keep up and thus dedicated ser...

I'm having the same problem. Was playing 1.1.45 and reverted to 1.1.42. Steam cloud sync is off. Copied blueprint-storage-backup.dat to blueprint-storage.dat. Regardless if I start a new game, load an older 1.1.42 map, or join a multiplayer 1.1.42 map, I get this popup. Loading blueprint storage fai...