I do not know if the RX-SSTV software on the amsat server is the last version. Few days agoo I had contact with Guy ON6MU about an issue with closing the RX-SSTV software from the menu. Guy made a few fixes, the latest version is to download from this link: http://users.belgacom.net/mysoftware/Setup_RXSSTV.exe
Version 1.4.3 -New: optional add FSK-ID to the filename when saving -bug fix: height of the main screen is increased to fix partially hidden icons when large fonts are used in the OS -bug fix: The file counter showed "empty" when there was one picture was in the History folder: fixed -Signal Spectrum FFT default -bug fix: RX-SSTV freezes when closing the program using the menu File->Exit (thanks Cor PD0RKC).
Be aware standard RX-SSTV put a date and time stamp on the received SSTV picture. If you want a "clean" SSTV picture go to the menu -->Setup-->RX-SSTV: Embed Date/Time/Call in Picture Choose --> never
If the received SSTV pictures comes skew on the screen go to Setup -->SSTV Engine: ......... Auto resync v Auto slant v ..........
73s Cor PD0RKC