I had an issue with NitroPDF Pro a few Months ago. Support just sent me a link to get the fixed program, which will be released soon. The issue is that Insight (NIS2010) removed (Quarantined) it from my PC and I had to get it back. What it said was that less than 10 people had this and so it was not verified. I know it is safe, but will this always happen if I am the first to get files?