Doesn't work and no support – Foxit PDF Business & Converter Review

I open a document to read, read it, close it and then it's gone. It's disappeared. There's no persistence over time for documents. I tried saving it but to no avail. Once I close it, it's gone. It's not in the documents folder, not in the recent folder, not in any folder. I just wanted a simple PDF reader to read PDF docs and I really wanted this one to work but it doesn't. The same thing is true of the business version. Same exact thing happens. I've tried uninstalling and reinstalling. No change. I don't always like to use the best app, GoodReader, for pdf's because I don't want to overload the program. I use it all day long and was just looking for a PDF reader I could read like a book, without making annotations. I've sent three or four emails to the developer asking for help but have not received a response. I paid for this app. I think I'm entitled to a response. I'm going to contact Apple and tell them I received no reply from the developer. I really wanted to use this app for light reading and when I'm reading a document it works but as soon as I close it, it disappears. It's nowhere in the program. Not in the documents folder; not in the recent folder; not anywhere. I would really appreciate some help from the developer but so far there has been none, despite my emails. It's just wrong to ignore your customers. It's a matter of principle.
Review by Mattressback on Foxit PDF Business & Converter.