You'll see that PnP stores the favorites information in the following .ini sections:
[fav]
[favopt]
[favserv]
2. Steps to take
You could backup the entire CONFIG directory under $mircdir (this saves all your settings!) or write yourself a script/alias that extracts only the
favorites from config.ini and another script/alias that imports this information... You could even turn this into a general backup addon - that
enables you to selectively choose what to backup and restore!