It is not yet possible to add a transition effect. (It will most likely eventually be possible, but that could be tomorrow or in 2 years, it all depends on what Bandisoft is willing to make out of Bandicut)
You can't add only-audio tracks to your video (yet).
However transfering a Bandicut license is no problem.
This is the license information for Bandicut:
A lifetime guarantee is offered as long as the below rules are followed:
If you uninstall the registered Bandicut, you can re-use/transfer the license to another computer.
If you format your computer or your computer is broken, you can re-use/transfer the license to another computer.
If you lost the serial number, go to https://www.bandicam.com/bandicut-video-cutter/buy/
and enter your purchasing email address. Your license will be sent to your email again.
I hope I was able to help you,
Thank you for reading my post. I hope you understand my "English".
I'm the German translator for some of Bandisoft's products and websites
(mostly Bandicut and Honeycam).