Hello fredwangsap,
Please run a repair of your office installation, test the issue, and if it is still present, follow these instructions to perform a deep-reinstallation of our software.
This method has a few extra steps beyond uninstalling, so please follow them closely, and be sure to Restart the computer at every point it is detailed, this is crucial to the process working.
Please go to: Control Panel\Programs\Programs and Features in your system and uninstall everything that is published by Tracker Software Products
Once this is complete, please restart your computer.
Once restarted, please go to regedit.exe built into every windows computer. Find it by typing "regedit.exe" in search bar of your start menu.
Please delete the following registry entries. Only the "Tracker Software" folder and all its sub-folders. **Be extremely careful as a mistake could render your computer useless**
- HKEY_LOCAL_MACHINE\SOFTWARE\Tracker Software
- HKEY_CURRENT_USER\Software\Tracker Software
You can now close Regedit.
Please make sure there are no Tracker Software folders here: C:\Program Files.
If so, please delete it.
Restart your computer.
Now install the software:
1. Please run the appropriate installer:
Editor or Editor plus users:
https://www.pdf-xchange.com/PDFXVE7.zip
PDF-XChange PRO users:
https://www.pdf-xchange.com/PDFXPro7.zip
2. When asked by the installer, please choose PRO version, then, copy/paste your serial key into the field provided. Be sure to use CTRL+V to paste the key
3. Now complete the installation and restart your PC.
I hope this helps!