Probably not but that's a chance you have to take with every game on here that isn't marked as completed. The titles are started on one version of software and if they go on long enough the version may change and old saves may not work. It's not like the dev says "screw em, I want everyone to start over", I'll bet he was way more upset about this than any of us as it probably made him change his workflow also.
Yeah I'm not trying to sound like an ungrateful shit (god knows there's enough of those around on here), love the dude's games. Just wanted clarification, because if that's the case I'll probably hang back from here on out till completion.