We have here now Dabomstew's Beta 3.0X OE Easy Version Changer v3.0, a day after this application's first release. Now, there have been a couple of changes already since then (and we're not surprised in the slightest bit since these devs seem to be working overtime lately).

What's new here since the first release? This one now supports 3.02 OE-A and OE-B. Also, it now reads your current version from systemctrl.prx as the default rather than always starting with 3.03 OE-A. Plus, there's now a reset to default function, wherein it automatically changes version in the editor to your FW's default.

This version also now has an added 3.03 OE-A support. Apart from that, the 3.03 OE-A character limit is still 10, while others are still at nine.

Anyhow, make sure to check out the Read me for the usage instructions. That's the safest way to go. Oh, and you can also check out the forums for updates and whatnots. Dabomstew assures that he will be releasing updates if there are problems discovered.
So, just keep it posted here.