You can use all base functions of ProgDVB free of charge without restrictions in ProgDVB Standard edition. Some additional functions, such as "Picture in a picture"(only in 5.x), AVC,H.264,AAC and DVB-S2 support, work with several audio streams and some other, are available in ProgDVB Professional only.
ProgDVB Standard and Professioanl contain mpeg-2 shareware codec by Elecard. After 21 days you should register it (Start->Programs->Elecard MPEG-2 plugIn for WMP->Elecard Registrator) or use other codecs. For AVC,H.264 support, you should register Elecard AVC,H.264 plugIn for ProgDVB. The registration is done wiht the Serial Number provided in your purchase confirmation email.