LAA is that Large Address Aware thingie. Sometimes if there's changes to the executable, MultiSH4 throws an error somewhat similar to what you're getting, but I don't think that's it. The crash trashed something on you, and it may not be worth the aggravation to try to figure out what it was. If you can start with RR's
SH4CMS (which I've been mis-naming lately as "Crash Management System", but it's actually "Corruption") it's relatively easy to restore, but setting it up takes some extra work beyond just a straight-up install... Chalk it up to another computer-slash-ubisoft-slash-whatever kind of problem that most likely will not have a easy resolution.