AVPSoft

I keep having a window pop up saying: "Impossible to open an instance of ghostscript. Error code: -100"
This happens on every PDF I try an open. Even on ones I've already opened in the past.

It seems that the GhostScript installation has been corrupted. Reinstall GhostScript library and restart APFill.

http://avpsoft.com/products/apfill/download/