looking 4 SW for IR and Freq measurements

Hi,
For some time ago I used to use MLSSA and WinMLS for making RA measurements for research and teaching, but cannot find anymore support for those SW. Even purchasing WinMLS licence seems not possible any longer. Anyone who can help where to get it, or even similar SW?

I appreciate.
Djamel.
 
ARTA and REW are very accessible apps for that (from a financial pov). Of those two, ARTA is also usable for speech intelligibility. And a bargain.

Haven't heard about MLSSA for a long time. That sure opened up measurement for the relatively poor in its days...