Is this file safe to work with? Does it have some spyware or something else that hurts my PC? And is it free to use or is it illegal?
The software is safe to work with. I checked the official website and managed to obtain the trial version of it. It's not free and requires purchasing in order to fully use it and its components.
A trial version can be downloaded for testing: https://www.cadlink.com/index.php/en/download-filmmaker-trial
This is a simple application that works with the supported devices and that's it.