Just found a crash using my version of this EN. If you are swapping between clients, and cover up a bar so that it's trying to get focus over and over while pathfinding... instant client close. I'm sure its something to do with opening the gump too quickly for the client to handle while a pathfind is happening. Every time it crashed it was while moving and the bar was covered, and the variable I had set showed it was in the scanbar sub. When I uncovered the bar or ran in 32 bit mode on win7, all was fine, not a single crash in hours of gameplay. This is using the EUO version of my bar, but I'm sure it probly applies to all. I'll test oeuo next. 
Interesting... Probably could handle this by adding a timer/count for attempts to open the bar and after x failors/time quit. Not sure what it does now i will have to check. Let me know how the openeuo test went.
EDIT this is the offending code
Repeat
event macro 57
wait 1
Until #Contname = BuffIcons_Gump
Not as easy fix as looks need to add an exception and carry that back so the script exits without further scan attempts. not difficult just time consuming. Surprised I did that normally I never have loops that can turn infinite.
EDIT EDIT: Actually thats probably not the problem at all but that would be a problem under diff circumstances.(Client not logged in)
EDIT EDIT EDIT: Umm I actually wonder if my script would ever have this issue.. im thinking its just your modded version that has the issue, as i distinctly remember testing for bar covered status.