Final Cut 7.03 export issue

Hi,

I have a system running OS X 10.10.5 (Yosemite) and using final cut 7.03.

Up until a couple days ago everything was fine, Now I can't export a quicktime file.

It's not a drive space issue, compressor works fine, adobe premiere & media encoder work fine.

I think my FCP preferences need to be trashed, That seems to be a fairly common issue.

But I cant find the four FCP files that need to be trashed in the preference folder as I've seen in youtube videos. Is there something different about Yosemite? Any insight would really be appreciated.

Thanks