My collection of UO clients for download.
client 188.8.131.52 – LAST UOSE.exe
Decrypted client 184.108.40.206.exe
Decrypted client 220.127.116.11.exe
Decrypted client 18.104.22.168.exe
Decrypted client 22.214.171.124.exe
Decrypted client 126.96.36.199 LAST UOSE.exe
Decrypted client 188.8.131.52.exe
Since some clients are not from official installer, due to new installer, which is not downloading older clients anymore, some clients are collected from players, so it can contain malicious software – use at you own risk. I was using clients without any issues.