Thanks for your rapid response. I ran the following from CMD line, does not match what is on your website. I am not an expert, just followed directions on how to perform an MD5 checksum on windows 10,
C:\Users\James\Documents>certutil -hashfile setup_PSXT_MSFS_v31.16.4.exe MD5
MD5 hash of setup_PSXT_MSFS_v31.16.4.exe: 5aabe358f3a7ea96fbefb0f31309e49a
CertUtil: -hashfile command completed successfully.