Maybe it's related to my issues with Windower too, I really don't know, but...
Every time I try booting up AV, nothing happens. I've checked the task manager and it's on there, but the memory usage seems a little low (as if the program is unresponsive). It never does load up, even after several hours.
ModelViewer is a bit different. It actually loads, but doesn't display any models at all. It's just the background color without any PC or NPC showing at all.
Both versions are current to my knowledge. I updated them both recently to see if that would fix the problem. The interesting thing is that AV, at least (I didn't check MV), worked last week. Though I think this was before I fully updated FFXI. I had used Windower.net's patcher to shave a few hours off the download time, but they worked fine after that. It wasn't until I fully updated that they stopped working.
I'm on Windows 7 x64, running as administrator, AV is v0.6.2.0 and I'm unsure about MV's version (both lists are from 10/29/09. AV does say 'FFXI has been updated, so AV may not work properly'.
Anyone suspect what the problem is?
XI Wiki

