Just a minute ago, I've tried exactly this over here.
And it did work easily, on ProgDVB 4.75, which is the latest version, that supports my Nexus' hardware features (almost) fully, and therefore is used here by default.
(OT: As I'm still running (a highly modified version of) Win98SE right now, for expensive hardware compatibility reasons, I will not retest on a more modern version through the following couple of days. My other machine does not have satellite.)
Did not even have to close and restart or anything else. Just switched channel back and forth once.
BTW, this old version won't read transponder tables at run time, so no auto update, except of scan time.
To avoid an unwanted update, set station to not update, and perhaps also edit the SID to an invalid value like 8191.
Anyway, I won't want to watch any of those stations, even if someone gave me money for this ...
But of course, that's no more than my personal point of view.