AFCAD 2 can't use export files produced by AFCAD 1, and there will likely be no method provided to convert them for use with AFCAD 2. This is because FS2002 facility data was more simplistic than FS2004 data and FS2002 did not control any visual elements. There is no practical way to automate merging the visual elements (markings, lights, surface textures, taxiway widths, runway extensions, taxiway signs, aprons, airport structures, etc) of FS2004 airport data with the simpler FS2002 facility data. The alternative would be a manual merging process, and that would likely require as much or more work from the user to ‘fix up’ all the resulting problems than to re-do the airport from scratch.