WXSIM (actually the WXSIMATE module of it) can read either Weather Display’s or Cumulus’ text files. For WD, they’re the ones like 12019lg.txt and 12019vantagelog.txt (the second one may not be necessary unless you have solar data). For Cumulus, they are the ones like Jan2019log.txt. If the files look like those, WXSIMATRE can read them.
Hope that helps!
Tom