Perhaps this is intentional, but when I go to Help->Check for Updates in KeePass I see for KeeOTP:
Status: Pre-release version.
Looking at the downloads page, version 1.3.6 is almost 2 years old. Version 1.3.7 is clearly marked as a Beta release, but 1.3.9 is not marked as Beta, and came out several months ago.
Is 1.3.6 still the most recent "stable" version or was a file missed in releasing 1.3.9?