The software will not be out until about June 1st. We're going to start beta testing very soon. We are demoing all of the features live here at SnF. Documentation will come out at the same time. Sorry the announcement doesn't make that obvious.
As for engine support and % power, we are always willing to consider other engines if demand warrants it. Feel free to point us to power charts for your engine and we'll consider adding them. We need % power info that uses MAP, RPM, altitude, and fuel flow, and we need the charts for ROP and LOP operation.
Given that, the current power charts should work pretty well for any engine with an 8.5:1 compression ratio.