Ham Radio Forum

I am new to this wonderful software. On the S-Meter page where I found it, the writer states: "Gary, DL2KQ-EU1TT, maintains a Library of MMANA Antenna Files that he frequently adds to." I have downloaded several files of interest frm his site. Problem: MMANA will only open files with extent .maa. Gary's files have extent .gaa. Even if I change .gaa to .maa the progrom won't open Gary's files. What am I missing here? My interest is in phased vertical arrays. Thank you
Regards/Jim K3NSW