Version 6.85 was a significant release because it added support for a host of new chips and improved stability for older ones. If you are trying to program a specific chip and your current software is throwing a "Chip not supported" error, updating to V6.85 (or newer) is usually the fix.
This version serves as the for the "Old Hardware" series (TL866A and TL866CS). Minipro V6.85 Download UPD
In the context of the TL866 community, this usually implies one of two things: Version 6
Each software release—like —brings critical improvements. The "UPD" in your search term stands for "Update", indicating you want the latest patched or full release. Minipro V6.85 Download UPD