Because the official software updates from the original manufacturer have become sporadic and difficult to find, the open-source community has taken over. A developer known as created an open-source command-line and GUI tool that works beautifully with the TL866.
The TL866 programmer market is rife with clones and counterfeit hardware. If you download a "cracked" or modified V6.85 executable from an unverified source (often labeled "UPD" on warez sites), you risk: Minipro V6.85 Download UPD