From Maurizio Maccani:
My Collection Explorer can manage the inventory of more than 40 different collection types (and the list is growing daily). For currency collectors it contains the catalogue of military payment certificates, fractional currency, small and large US banknotes, national banknotes including a complete database of national charter banks. The philatelic offer includes the regular, commemorative and airmail stamps catalogue and templates for the inventory of First Day Covers, Postal Covers and Postal Stationery collections. Version 4.0 build 1536 may include unspecified updates, enhancements, or bug fixes.