Exact same case here, i tried so hard to fix that ...
First i used the 1.3.8 software and it crashed everytime i started the .exe
After that i tested the 1.3.9, it started but without fans detected ..
After that, the software started with an error message sayin there is an issue with controller 1 and it close just after that.
After that, dont know how and why but it worked !!!
YES ! it worked with a new error message, 2 errors message to be exact but it worked for 3-4 days
And now guess what ?
Now it depend, sometimes it detect 1 controller, sometimes 0 but i never saw the 2 controllers being detected in same time since many days now ...
Sometimes i got 2 of 5 fans on first controller detected, sometimes its only 2 of 4 fans on the second controller ...
This is a big mess and they uploaded the last software few days ago after many month after release the latest version ..
I'm so mad i already spend more than 20 hours on forums, reddit, youtube ...
I'm tired of that, 9 fans, so expensive ...
#feelsbadman