Worked fine now it doest

Worked fine for months. Now it can not find the scanner. Contacted tech support repeatedly. They were no help. They gave me answers that might help a tech specialist. I kept asking for clear steps to correct the problem. I have tried to do what they said but it did not work. I have tried to make it work with each OS update with no success.

Quickemart1 about PDFScanner - Scanning and OCR