Hello,

Programs from previous updates will not be replaced.

“Analog Drift” is a preset for the PolySynth algorithm, not a Program. There is no factory Program called “Analog Drift” that I know of, you may be thinking of something else.

I’m not seeing any factory Programs that use PolySynth and SP2016. Are you sure this wasn’t a program you created or downloaded from somewhere else?

Using H90 Control would be the best way to browse all of the Programs on your H90. Unless you intentionally deleted or saved over the Program, it should still be there.