4
Under normal circumstances, most modules for XOOPS 2.0.x should work in 2.3.x, unless they are very old and archaic. Therefore, there is no change needed to be recognized.
The fact that XOOPS 2.3.2b doesn't recognize a module (i.e. the module is not visible in Admin), has most of the time something to do with another module, or with language files, or with D3 Modules from GIJoe placed in the wrong directory.