Yes, this is a limitation of the software. It doesn't allow to connect a machine to transfer, upload, download and extract the data. This is the way the software has been designed.
If you are not satisfied with the way the demo works, you can then simply forward this to the developers, but I doubt they will do something about it and will recommend to actually buy the program instead.
Here is the contact page: https://www.softbyte.co.uk/contact.htm