Just Flight has released a demo for the TB-10 Tobago & TB-20 Trinidad.
The fully-featured demo, for FSX and Prepar3D, is available as a 434MB download and is limited to ten minutes of flying time below 1,500ft AGL. Two liveries are included, TB-10 (N5548C) and TB-20 (G-VPPL).
Please note that this demo MUST be uninstalled prior to installing the full product.
Click here to download the demo from the Just Flight website