In attempt to fix this issue, please try the steps below:
Uninstall Pixillion, then delete 3 folders named "Pixillion" and 1 named "Components" from these locations:
**C:\Users\<username>\AppData\Roaming\NCH Software\Pixillion\
**C:\Program Files (x86)\NCH Software\Pixillion\
**C:\Program Files (x86)\NCH Software\Components
**C:\ProgramData\NCH Software\Pixillion\
**If you can't find any of the folders, just continue.
After that, restart your computer and reinstall the program using this link: https://www.nchsoftware.com/imageconverter/pixpsetup.exe
Once done, restart your system one more time and try again.