This now accepts the name of a VASL preferences file as a command-line argument so you can edit the copies of VASL that VASSALlauncher puts in appdata\roaming\VASSAL\prefs\VASSALlauncher. The VASL_* files are VASSALlauncher's copies; you can deduce which config they belong to by the name, which is in this format:
VASL_<config name>_<.vmod filename><VASSAL version>
I may integrate this function into a future version of VASSALlauncher.
