If you haven't already sold the 595, or smashed it with a hammer, I have good news to you
It is very easy and simple, to get you old FAV back in 595.
But first, I'm talking about the places stored with the heart symbol (in danish directly translatet it is "saved placed"). I don't know if it is FAV on your 595, but I think so.
Connect you 595 to computer and start Base Camp.
Then the places with the heart, (here after called FAV) will automatically be loaded into BC
In BC choise tool to create new FAV
With the tool click directly on top off your old FAV
A new FAV will be createt with same name, there will just be added the previous mentioned "1" after the name.
Do this on all the FAV you desire
Then delete all old FAV (without the "1") in BC
Then delete all FAV on 595 (you have to disconnect it from computer first)
Connect 595 to computer again.
Transfer new FAV to 595
And now the FAV will be on your 595.
Rename your FAV on 595 so they don't have the added "1"....if you care...
And also as previous mentioned, you can't zoom very much out, the scale on 595 have to be 2 kilometers or less