Hello,
the data saved from addons, is saved in the "user.cfg" file located in "Allods Folder/Personal/".
You maybe can try to delete (backup somewhere) the user.cfg, then change the name of "user.cfg.bak" (located in the same folder) to "user.cfg". After that start the game and try again if you can save some builds.
Every addon setting you've done ingame is saved in the user.cfg file. Maybe there is a lock on it so that the data cannot be written into this file.
And be careful: If you delete your user.cfg permanently, so it's permanently deleted and you cannot restore it with user.cfg.bak for example then you have to adjust your addons from the beginning.
Hope this helps a bit
PS: If you are looking for the data in user.cfg you should search the file for the line "t_b ScriptUserMods_ZBuilds" everything til the line "t_e ScriptUserMods_ZBuilds" is data of your builds