The WICReset installer gave two hits on VirusTotal before, and it still gives one now. I don't know what installer you are linking the results to above. I am using the installer that extracts from a zip file and is linked to right on the 2manuals.com home page. I get different hashes for that extracted installer and the installer you linked to above.
I understand false positives, we all have run into that, but I don't understand why you encrypted license.exe within license.zip and stuck the password unencrypted in the outer zip file. You understand, this is almost solely a tactic that malware distributors use to fox scanners. Of course, no one who is distributing malware is going to say, yes, I am distributing malware. All will say "oh it's a false positive". So we as consumers base decisions on several factors. The nature of the product, being a grey-market item, already increases the risk level. Add in detections on VirusTotal and the fact you are using a malware distribution technique that defies an innocent explanation, and it makes things suspect at best.
What is license.exe actually doing? Is it communicating with the printer? From what I have read it is just generating a hash code that you enter into the printer's modified firmware. If this latter is the case, then why can't you generate that hash code from your web site, or email it to the purchaser?