because it's supposed to be broken and/or backdoored since may 2014 when the development abruptly stopped and weird warnings appeared on the official site to switch to alternative programs

There's no evidence it's been "backdoored since may 2014." There were no changes at that point in time.

"supposed [...] since may 2014"

Although, who really knows at this point. Judge for yourself what happened: https://mastermind.atavist.com/he-always-had-a-dark-side