Fengtao, DVDFab Platinum upgrade support

Received no response from Fengtao, author of DVDIdle software, after multiple emails requesting upgrade key to version 3.x of DVDFab Platinum.

Purchased DVDFab Platinum at version 2.x, and website still states free lifetime upgrade. Sent requests through their website’s default request to “resend key” and also through their website’s email to tech support and business support, but no responses for approximately 6 weeks. I am a registered purchaser, at same email address as at time of purchase, and have kept my original key on my computer only. These details were provided in each email to Fengtao software.

Is anyone aware of difficulties communicating with Fengtao software or other people obtaining the advertised free lifetime upgrades to DVDFab Platinum?