Hey there.
Sorry to say. There's been a lot of reported problems with the Pentax Photo Lab program. I would try to reinstall the program first because I had the problem on my first go and that resolved it. Hope that works for you.
The other problems that have been on-going and unresolved are sitting in this thread.
https://www.pentaxforums.com/forums/pentax-dslr-discussion/2090-pentax-photo-...y-problem.html
Had something to do with PPL3 crashing when making adjustments to the white balance in raw files.
I've been using Picasa for stuff that I post here or send to friends. I'm planning to use Bibble for other stuff.