i use better bts ai as a mod.
I updata it just paste the new files to the mods/better bet ai

when i update 0.37 to 0.40 it's all right(i forget if it really ok....)
but when i updata to 0.41 i can't load the old games.

it tell me the assets has been changed;

when i get back to 0.40. i can't load my game still....
i want to goback 0.37,but i lost the files.

can anyone provide me the 0.37

I couldn't find a direct link from sourceforge, but I hacked this with very little trouble...
http://downloads.sourceforge.net/civ4betterai/Better_BTS_AI_0.37.zip

Hmmm ... we lost save game compatibility? Interesting, I wonder what did it.

Based on that line about assets, I don't think it's save compatibility but Locked Modified Assets on the OP's game so 0.40 was probably a problem for him/her too.

Few! Thanks Dresden, good point.

i guess the problem come with the Locked Modified Assets .
the assets files changed,and the files hsa been replaced.when i get back ,maybe the files modified time has been change?

thanks to you all.

Now I creat a new folder named Better BTS AI 041 to place new version .
maybe this way could hold the old files to deal with old Locked Modified Assets games