Could you please try the following procedure for clean reinstall:
I've numbered the steps below to make them easier to follow:
1) Uninstall all products of ours that you have installed. Restart the computer.
**Note: restarting the computer at all prompted points is a very large part of making this work, so please be sure to do them
**Note: Also be sure to disable any and all anti virus programs that you have running and make sure that you are logged in as the Administrator.
2) Open up File Explorer and navigate to C:\Program Files and delete the PDF-XChange and/or Tracker Software folder.
3) Now, go to the Windows search bar and type in " regedit ", then right click and hit "Run as Administrator" - the following will show up:
4) Go to HKEY_CURRENT_USER\Software and delete the Tracker Software / PDF-XChange folder
5) Go to HKEY_LOCAL_MACHINE\SOFTWARE and delete Tracker Software / PDF-XChange folder.After that , please restart your computer.
6) Re-install all the products you have installed before with this link:
Before the new installation, please disable temporary any antivirus and firewall software you have.
7) Now complete the install and restart Windows.
I hope this helps.