Kenn check your backup like Torfinn says, if you havent delete the file from your system it may also be in the trash where you can retreive it.
From the Readme file:
The AutoSave feature is enabled in TurboCAD to save your work every 10 minutes by default, in case of a power failure or system crash. In these events, you can recover the drawing by navigating to your Documents folder, for example:
C:\Users\[username]\My Documents\TurboCAD Professional 2016 x64
Here you will find the Drawings, Backup and Config folders as well as the Autosave folder. In the Autosave folder you may find a file such as: ~tc0.asv
If there is an .ASV file there with a recent date/time stamp, immediately copy it to a safe place such as your Desktop and then rename it to your drawing name like so: xyzzyRecover.TCW
TCW V21, 2016-2019 PP, Animation Lab V5, TurboPDF V2-V3 & LightWorks Rendering Engine mostly.