Program Files\SD Tools\Format

the rest will be unallocated space which can be restored with a genuine PC SD format program by eg Panasonic or Toshiba, last time I tried (years ago now) Windows Disk Manager could not delete the 1GB partition and restore the full 2G.

A 2GB card will format as 2GB in SD Jukebox and work OK in the KN7000, but the % remaining screen display will be incorrect.