X7 Crashes when opening a file

I need some help! My company just installed X7 on my computer and it's been completely unusable. At first it crashed everytime it opened. But a F8 reboot now allows it the program to open, but it now unable to open a file. 

Some details:

-I can open a file I create with X7

-I cannot open a file I created with X6, or a coworker has created with X7

-I'm running X7 on Windows 8.1 through bootcamp

-Latest Patch update installed

-Latest Windows drivers installed

I'll try anything to avoid installing Windows! Thanks for the help