I hope that I can finally resolve this issue.
It all started when PDN prompted me to update to 4.0.2 a few weeks ago when I opened it. After closing and attempting to update, I got fatal error 1603 and it closed. PDN was then no where to be found on my PC. After looking through the logs, I found one error - actually, the only log that had anything in it:
"32 bit MSI may not be installed on 64 bit OS."
I've looked through everything, read all the fixes, tried almost all of them (trustedinstaller download says the file is invalid, so I can't use that) ran as admin, installed .NET 4.5.2, repaired it, etc, etc, etc. I've been through so many restarts and whatnot. PDN has chosen to fail when I need it the most, and I'm not going to waste $100+ on a 32 bit OS just so I can install a program. I've also googled everywhere to no avail. So please, can someone help me? Like I said, I really need PDN right now.