You gotta grab your stuff, back it up (hope it doesn't screw up), put it back on your EVO, hope it all still works.
Lame. I know.
The latest update v188.8.131.52 RC1 does require a wipe for only one reason (well two).
- The MMS compression fix absolutely requires a fresh install. After you fresh install this version, this will not require another wipe (small price to pay IMO).
- I was sloppy in making RC1. When I make updates, I make sure I remove the files that may have been left behind from previous versions. Although I think I did cover my tracks like I normally do, it is possible I didn't. So, even if the MMS fix wasn't in this ROM. I would highly recommend a wipe anyway.
Anyways... if you haven't downloaded RC1, grab it now from the downloads section.