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I have just installed Nitro Pro 13 having been a user since version 7. All seemed fine until I tried to open a emailed pdf attached - it's an invoice I receive monthly and always opened correctly with previous versions of Nitro Pro. When I try and open it itro Pro starts up, waits a few seconds, no document is displayed, then quits and gives me the Crash Report dialog. I have done a bit of searching and tried the following. 1. Repaired the installation - No change 2. Uninstalled and re-installed - No change 3.Repaired the installation again - No change 4. Uninstalled and re-installed again - No change I always restarted the computer before and after each repair and uninstall/reinstall cycle. After each uninstall I removed the Nitro printer port and driver & package using the Printer Serve dialog. I removed all Nitro folders on drive C. I removed all registry entries relating to Nitro and then ran a registry cleaner (Piriform Ccleaner Cloud). I then did what I should have done first and tried a different PDF. Hey presto it worked. I tried a few more. All opened correctly. So the issue is with this particular PDF. I still have Nitro Pro 12 on an old laptop so tried to open the offending pdf with that version. No problem at all. I optimized the pdf, removing embedded fonts to see if that was the issue. Version 13 still won't open it. I then printed the pdf using the Nitro Pro 12 pdf printer. This could be opened by version 13. So the issue is when Nitro Po 13 opens what is, on the surface, a perfectly OK pdf. I don't know whether it's a particular pdf version or perhaps the software used to create the pdf that is the issue. I do know that Version 12 opened all these pdfs without issues (I have checked all similar pdfs I received this year) and Version 13 does not so I have to point the waggly finger at Version 13 I am afraid.. I am happy to send the offending pdf to the Nitro team for analysis if it someone can let me know how to reach them. I don't think I have VIP access, although you'd think I'd get it automatically having been a loyal customer since version 7 (perhaps even before but I can't check back that far at the moment.) But that's a different conversation :-)

Not knowing when this issue will be resolved (is there an update?), can you please tell us how to temporarily downgrade back to version 12? I've done some searching and haven't located the V12 installer. Thanks. . M