Hrm, it shows nothing. Maybe they don't bother to tag specific builds that aren't being released. I just have an exe made specifically to test the triple wide fix.
Weird, thats all they provided to you? an exe? and you can play in PB enabled servers?? you would think PB would pick up changes made in the exe, so sad you cant trust anyone to release it, even if they do watermark it, it would be pretty easy to hex edit the R10 exe with the triple screen fix and not the watermark linking your account. Though, honestly im pretty sure they dont watermark each beta version, doesnt make sense.
If they dont do it for reviewers they wont be doing it for beta testers, seriously. Reviewers leak entire games and they never find out who leaked it because they are not watermarked, what makes you think that they would with a small patch with little implications to the larger user base.