I wrote an exporter plugin for LightRoom 3 and 4. The code was compiled with SDK-4 using the windows version of Luac version 5.2.1. The compiled project works fine with LR4 but crashes when attempting to use the plugin for a second time [in LR3].
My intuition tells me that I need to (a) compile with an earlier version of Lua (b) with SDK-3.
Can anyone confirm which version of Lua and SDK should work with the latest version of LR3?