V5 is packaged with both Win32 and Win64 versions and designed and tested to run on Windows 10. The correct version is installed automatically for you based on your Operating System platform. Prior Windows versions should work, but have not been tested.
Versions 3 & 4
V3 and V4 are Win32 programs, but should run without issues on a Windows 64 bit system.
If you encounter security related errors with Version 3, log in as administrator and grant all users full (read/write) access to the C:\Present3 application folder.