I don't know if this will help anybody, but this is how I solved my problem. I was trying to get Quicken 2007-Lion running on a MacBook Air and an iMac. On the MacBook Air, I didn't have the 3vix plug in suspected of causing problems, nor did removing the quotes file from the data file package work.
Then I looked in the same folder that the 3vix would be (if I had it) MacintoshHD>Library>QuickTime and found these two files:
Google Camera Adapter 0.component
Google Camera Adapter 1.component
I don't know what these are for, but I deleted them, and it worked!
I thought I was set and started on my iMac. These same two files were not present on the iMac, nor was the 3vix file. However, Quicken wouldn't launch on the iMac. My solution was to move an already converted data file from the MacBook Air, where Quicken was running fine, and move it to the iMac, and it worked fine. It appears, at least in my case, that the crashes were occurring when Quicken was trying to convert my data file. I also tried to set up a new file, and it crashed then too.
So if you are having crash problems, you might want to look for those two files, or alternatively, find someone who is successfully running Quicken 2007-Lion and convert your data file on their computer, then move it to your own.
Dan