We have thoroughly tested DCS 2.7.7.15038 and unfortunately have not been able to get our hand tracking working in this by changing or modifying the dll as was possible in previous versions.
If you wish to use our Gemini V5 hand tracking in this version then you will need to wait for an official update from Eagle Dynamics due to the changes in file structure in this version. Please note that you can still use our previous Orion V4 hand tracking in this version of DCS World.
We are in communication with them as well as we are keen as well to see our latest hand tracking working well in the latest versions of DCS World!