No should be fine, just update and *clean* SVN it then zip it up I think? Note the true version is actually v40.0.601, not v40. If we release patches I expect they will be v40.1.xxx, v40.2.xxx. I think it will not be any problem to just call it v40 on moddb though. Crashdumps/logs etc will still have the full version number. I suggest you put the version number in the zip file name (like Caveman2Cosmos_v40). I notice the older ones on moddb do, but the most recent one was missing the version number.