If digital signature is what you're going for you're probably looking for a 4.82.x build.
- I have Messenger Plus! 4.82.0.368, signed by Patchou on 19 July 2009.
- The next thing I have after that is Messenger Plus! Live 4.83.0.372, signed on 22 October 2009 by Yuna Software Limited.
- Although I also have a Messenger Plus! 3.63.1.148, signed on 9 August 2010 by Patchou.
- EDIT: Builds were signed by Patchou once in a while during 2010. Most recent I have signed by Patchou is 4.85.1.386 (8 August 2010).
- Also edit: 4.84.384 (06/06/2010) wasn't signed by Patchou, but 4.84.0.382 (27 April 2010) and 4.85.0.386 (23 July 2010) were.
Under which name it was signed is probably not the best indicator of which build you're looking for. Transition during the 4.8x versions was gradual. There were also many silent build updates which people didn't realize (mainly sponsor package experimentation). But if memory serves me right the build frenzy really started at 4.83.
Also consider which Messenger version you intend to use it on. The older 4.x builds don't work with a lot of newer WLM builds.
If you want any of the builds mentioned above, PM me for a link. Cookie probably has a more complete collection though
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