Steinberg Download Assistant crashes on start

I wanted to upgrade from Wavelab 9.5 LE to Wavelab Elements , I tried to download the upgrade installing first SDA but it crashes all the time on startup.

It’s not a new problem with SDA but I really don’t know what to do, I never saw it solved on the forum.

Please help.

My laptop system (Macbook Pro) OS X El Capitan 10.11.6

I don’t know if this will be any help, but Daniel at Steinberg in the following thread suggested it’s probably because of corrupted fonts on the system, so suggests opening the Font Book application, select all the fonts, and run Validate Fonts from the menu, and repair any problem found. It doesn’t take very long to run, and might help.
https://www.steinberg.net/forums/viewtopic.php?t=139683