PlanetsCentral

I'm using Winplan and once I renamed the XYPlan6.dat to XYPlan.dat, it seemed to work fine.

Do ships have to be set to Scan in order to find planets?

Ale Ortú in Winplan Trouble:

How can Winplan show a different map than the other programs that are working on the same folder (EchoView and PCC2)?

I've never used Winplan, but I suppose it's possible that it doesn't support player-specific maps (e.g. XYPLAN<playernumber>.DAT)
You can try copying xyplan11.dat over xyplan.dat (if that works you'd have to do it every turn).

Stefan: I have map concerns of my own. Specifically, are you certain exploremap is working as intended? It's possible I started in a very bad place, but even though I moved my ships this turn I don't see any new planets this turn compared to last. What is the planet scan range config for exploremap?