Thanks for the feedback. I am grateful to hear this is working, there is hope (we are using the same tools as your are Jean).
In the most recent test, I didn't ignore anything, so Library was included, and it still failed on my partners computer. I was starting to look through the error log that Alex recommended, but thought I should do it with Library excluded, so I am doing another test with "proper" settings first and will report that.
NOTE: During this time we have discovered some odd behavior with my partner's Unity install (not able to import an fbx file), so he is reinstalling. I will report back after we retest with his new install.