I've created a couple of models in AssetForge 1.3 which I tried to import in the new 2.1.1 version. However, import silently fails. No error. no message.
The models are rather simple, for example this:
# Made using Asset Forge (1.3) :models Aircraft/engine_airplane%[(0, -0.6, 0.5);(0.0, 180.0, 0.0);(1.0, 1.0, 1.0);engine_airplane%_42;black+blueSteel+_defaultMat] Aircraft/engine_airplane%[(-0.4, 0, 0.5);(0.0, 180.0, 0.0);(1.0, 1.0, 1.0);engine_airplane%_45;black+blueSteel+_defaultMat] Aircraft/engine_airplane%[(0.4, 0, 0.5);(0.0, 180.0, 0.0);(1.0, 1.0, 1.0);engine_airplane%_46;black+blueSteel+_defaultMat] Aircraft/engine_rocket%[(0, -0.4, 0.25);(0.0, 0.0, 0.0);(1.0, 1.0, 0.5);engine_rocket%_53;blueSteel+black] :materials black[RGBA(0.267, 0.267, 0.267, 1.000);] blueSteel[RGBA(0.141, 0.565, 0.831, 1.000);] _defaultMat[RGBA(1.000, 1.000, 1.000, 1.000);] :textures :extra
The reason seems to be that all blocks have been renamed in the new AssetForge version making it impossible to import from previous versions. Though I understand the reasoning and desire for cleaning up models, this seems to be a potential long term issue with the app. If it cannot be guaranteed that I can import my models again some time down the road, then I cannot use AssetForge for creating maintainable game assets.
A possible solution could be an option to bundle the original blocks in AssetForge's "model" format. Of course this would blow up the size dramatically but I could ensure that models stay editable for as long as the format itself is supported.