@shane Thank you for testing out the troubleshooting steps with this info I can ask the developers to review your issue. It is however a good sign that you can export the image sequence, for now you could use a free video editor and import the image sequence into it and if you need sound, you can easily finalize the video using the video editor soundtracks.
Regarding toonboom I get what you mean. I got certified on toonboom harmony a few years ago, and at the beginning I recall it being very alien to me, particularly because I had been using Flash for over 15 years.
After a while you kind of get used to the workflow, but I do understand it’s very difficult to simply “happen” upon the features you require to animate at first without proper training. Besides Harmony is just a mammoth of a program, it could be called a suite at this point, since you can do storyboarding, hand drawn animation, cut-out, 3D manipulation, bitmap & vector coloring pipelines, compositing, character rigging, and much more.
Anyway good luck with your computer. Hopefully Pencil2D can improve in the meantime so you can test it again later on (and have it hopefully work this time 
)