Got my Theron and its a lovely piece of kit for the price. Installed latest drivers and updated firmware but I observed that the OSD is not appearing. The DPI does change but I have no visual confirmation.
Backtracking the posts here, I figured that the software must be suspect. I dont have a "disable OSD" option despite downloading the alleged new drivers on the official site. It turns out that the version of AP on the site was version 1.0.0 as indicated on the GUI and Autorun.ini file inside the supposed to be "ttesports_theron_ap_v1.3" zip containing the updated one.