Updated with Pidgin 2.4.0. You can find it here.
Note that some time ago Windows in no more my main operating system, so I do not use Pidgin Portable every day: please let me know if you have any problem.
Tag: Pidgin Portable
Pidgin Portable 2.3.1
Updated with Pidgin 2.3.1 + OTR plugin. You can find it here.
The problem with OTR plugin seems to be fixed in this version of Pidgin.