+Auto Detect hot/cold defective pixel without MasterDark. PixelMath RemoveBadPixels.xpsm in attachment.
+Show DefectivMap in Real-Time Preview. And Show Inverted DefectivMap.
+Snapshot of Real-Time Preview in real size of sources image or defined Preview. Useful for generate DefectiveMap file.
Note: you can use both method ( with and without MasterDark ) in one pass.
So, if you have fresh MasterDark - use MasterDark.
If you have old MasterDark and you think in your CCD there are new defective pixels, which not so bright in the old MasterDark - use the MasterDark plus Auto Detect method.
Anyway, you can control all process in Real-Time Preview and via Snapshot.