The Mnova license you got before December 2019 is for version 11.*. You'll 'need to email email@example.com to get the license for 14.1.
You can get a free Topspin academia license from Bruker's website, and install processing only Topspin on your computer. It will allow you not only to process your data, but also to play around with acquisition parameters, pulse sequences, etc. In partnership with Bruker, Mestrelab allows you to try NMRPredict plugin for Mnova for three months.