MySecretFolder is currently available in the following editions:

MySecretFolder 32-bit Edition
for Windows Vista, XP, 2000 (32-bit)

This edition is for the 32-bit versions of Windows such as Vista, XP, Server (all 32-bit editions). It is also backward compatible with Windows 2000. This edition cannot be used with Windows 95, 98, Me, or Windows NT 4.0 or any other older version of Windows.

MySecretFolder x64 Edition
for Windows Vista, XP x64 (64-bit)

This edition is for the 64-bit versions of Windows such as Windows Vista or XP x64 (all 64-bit editions). This edition cannot be used with any of the 32-bit versions of Windows.