This software is completely free. If you really want to exchange money for this software, please consider donating what you can to a charity that you believe in.
The latest version of TAPA Version 1.1.2 (Updated on 2018-06-29) can be downloaded here:
Download TAPA portable (non-installer version)
TAPA is currently only being developed for Windows. You will need to install Microsoft .NET 4.6.2 in order to run this program. You can download this version of .NET from the official Microsoft webpage, located here:
There is a good chance that TAPA could be compiled to run on non-Windows machines via Mono. However, I have not personally tried this yet.