If like me you've spent the whole morning trying to figure out how to convert your .prn files to another format that is easily viewable and unlike me you've had no success, I'd like to point you to post: http://www.computing.net/answers/wi...
Unfortunately too many people have answered/replied and it's not easy to find the right solution for you. (I also tried to reply to that post, but the website re-directed me to open a new one)
Answer #23 is the best in there.
Although I wouldn't download the fax demo version that puts DEMO on every page.
Steps to diagnose:
1. Go to http://www.lincolnco.com, click on the "download trial software" link and enter some details on the form which will take you to the download links.
2. Download the first option PCL to PDF converter
3. Install it and run it.
4. Click Open and select one of your .prn files.
5. The application will attempt to automatically convert to .pdf.
If all went well, there is a .pdf file in the same directory as your .prn file with the same name as the file you selected.
If not, maybe the file format is not PCL, maybe it is postscript.
6. Try opening the file and when you get a list of programs, select Acrobat Reader, but make sure you untick the "Always use this program" checkbox.
7. If it opens, job done!
8. You can keep using Acrobat to open those files or save as .pdf
9. Go to the ghostscript website http://pages.cs.wisc.edu/~ghost/
10. Download and install GhostScript and GSView (in that order)
11. Make a copy of a .prn file and change the extension to .ps
12. Use GSView to open the file.
13. If it opens, job done! Again you can print or save as .pdf.
By this point I'd expect you've opened and converted your file, actually for most people steps 1 to 5 should work.
If you just want to print the damn thing and are not bothered about converting it to another format so you can view it on your screen, try PrnPrint by Russell Wright: http://www.magma.ca/~russrite/prnpr...
Good luck everyone!