Default App for Rev Files on MacOS X Tiger

[Dave]

Hi,

I installed 2.7.x and tested it for 30 days, then got rid of it and  
went back to 2.6.6.152. Now all the .rev files won't open in  
2.6.6.152. I just get an error message whenever I double-click them.  
If I change the default app on the file using the Finder Get Info  
command the start to open correctly again.

Any ideas on how to fix it on ALL my .rev files?

Thanks a lot
All the Best
Dave