My copy of Illustrator CC was working absolutely fine until I stupidly updated it to 17.1. Now it crashes on startup with the error dialog "Missing required plugins. PDF File Format". Now I haven't done ANYTHING to cause this, but my mission-critical software is unusable, and there are no clues about where this plugin should be, how I get a replacement, why it isn't there.
If it is so critical to the operation of Illustrator, why doesn't the updater check for it being there when it performs the update? How can the update complete successfully and leave Illustrator in a non-functional state like this? I have to say that i suspect that Illustrator is getting too complex for its own good and maybe this is a wake-up call to look for an alternative that won't be so fragile!