The alice acx
commands can be used to dump .acx files to .csv format and rebuild them.
To dump a .acx file:
alice acx dump -o out.csv in.acx
To rebuild a .acx file from a .csv:
alice acx build -o out.acx in.csv
NOTE: You should edit the .csv files with a text editor, NOT EXCEL. Excel likes to destroy .csv files in all sorts of idiotic ways. Don’t use excel.