A question on this and blender .... I downloaded corona, unpacked it somewhere, added your .exe file and have shown the blender plugin, where this directory is ... but not much happens when I try to render in corona render in blender (in fact, nothing happens once you hit F12 to render in blender).
I went testing on commandline ... just corona.exe gives me the help text correctly. I then located an old .obj and .mlt file pair I have .... and tried corona.exe sofee.obj .... it dies with an error, that it could not locate sofee.objsofee.mtl (no space in between)?