WiSo, I've seen this happen now with a couple of games (PGR2 and Rugby League). It just seems to pause at the Processing ACL screen. Now, I don't know if it's a coincidence, but both of these games have a lot of small files (a few thousand). I noticed that the [default] ACL entry searches through all .xbe files, so is this problem perhaps because it has to check through every single file? I'm just guessing here.
As a workaround, you can edit the [default] ACL entry to search and patch only default.xbe, instead of all .xbes, and this seems to work. However, I don't know if there was a reason why the [default] ACL entry was set to patch all .xbes in the first place.
This is what your editted ACL entry could look like:
| CODE |
[default] CP|${DEST}\default.xbe|${DEST}\default.xbe_orig| HR|${DEST}\default.xbe|1|744BE8CAFDFFFF85C07D0633C05050EB44F605|744BE8CAFDFFFF85C0EB0633C05050EB44F605| HR|${DEST}\default.xbe|1|E8CAFDFFFF85C07D|E8CAFDFFFF85C0EB| SM|${DEST}\default.xbe|400001FF| |