I had version 0.4 and worked very well on model what I wanted problem was with materials, model uses few materials. Tool not exporting .mtl file so merge it into one material
Now on 0.6.5 still I have missing .mtl file, so all materials are merged into one, Tool freeze and not responding during exporting, but model show up and i can open it, but have missing faces
pic with freeze of tool
pic with missing faces
pic with exported model using version 0.4 of the tool
https://mega.nz/file/iQhHiQQY#82_1GfPqgwHJerPBgiwskwm1yUieT0iTFIRdDwFBPKk - this building what im trying to get (this is not only that, other also have a problem)
I seem to have fixed the saving of the model. Perhaps something else broke
As for the material files, they are also stored and processed in separate files from the geometry. And their support is not yet provided in the program. But, as I understand it, each separate group of polygons in the saved model has its own material.