scenario:
Before this commit you'd see a confusing error.
B4A6V4XYXGSM3XEU3RB76OZKQMCSLE6GUTE6LNJB7SLUNQVYUXBAC
7TQAF4BYIK75EEYCCK7VEUSZHNCWMWIA3HZGQKIILYESUZ5ZZRVQC
if App_name == nil then return end -- we never connected to an app; save no settings