Is that relatively easy to do or not? I'm a no programming expert, I only know the basics of how that works.
I have only compiled software via MacPorts in the past. It was easy but some applications take a fair amount of time to compile.
It would require Xcode to be installed, AFAIK.
But, for $1.99 to install it on all of your systems, you might as well purchase it from the app store.
It releases you from your obligation to donate to the project if you use and/or benefit from the project enough to justify making a donation anyway.
I just don't like the fact that the menubar icon can't be hidden, AFAIK.