Yes, PSIM Versions 9.3 to v2020a are tested and fully functioning on Windows 10.
PSIM Versions 7.1.2 to 11.0 are all tested and fully functional in Windows 7 and 8.
Yes, PSIM Versions 7.1.2 to v2020a are all tested and running on 64-bit machines. In addition, PSIM Version 9 – 12 are available as both 32- and 64-bit.
Going forward with v2020a, only 64-bit is available.