You might have overstressed the gearbox by applying too much torque, make sure to slowly apply power with your throttle to avoid overtorquing.

You need to repair the damage by using the repair option on the tablet

Please make sure to upload the addon folders at the right location.

Let’s take the Huey for example:

Only drag the drop the folder called "taog-uh1h-huey" in your MSFS Community folder

How to find the community folder :

https://flightsimulator.zendesk.com/hc/en-us/articles/7058492594588-How-to-install-mods-in-Microsoft-Flight-Simulator

Please make sure to read the manual,
All T.H. Aircraft are equipped with a tablet located inthe cockpit, that allows users to manually choose the attachments they want to see on their aircraft.

All addons come with their manuals in the ZIP file.

But you can also visit the dedicated page on this website here

Yes, the addons made for MSFS2020 are compatible with MSFS2024, updates to have fully compatible addons will come later down the line.

The manual provides a full startup flow and explanation of key bindings.

Helicopters are complex machines and we are slowly implementing auto start procedures.