mbmk2020/Marshall-Mix-Design-M.B.M.K- — reverse-engineered prompt

Build me a simple Windows desktop program for Marshall Mix Design of asphalt mixtures. I want to load a text file with lab results, where each line has asphalt content, dry weight, wet weight, stability, and flow, and each sample group is separated by a line of all zeros.

The program should read the file, group the trials by asphalt content, calculate the needed Marshall mix values, average the trials for each asphalt content, and help determine the optimum asphalt content. Make the screens easy for a pavement lab user, with a main screen, a place to view the imported data, an analysis screen, and a criteria screen for checking the mix against limits.

Please include a sample input file using the format from the README, handle bad or missing values gracefully, and show clear messages so the user knows what went wrong. Keep it practical and user friendly, not overly complicated.