Back in the day, when I installed the Beta client, they gave me a choice of where to install it.
It created the folder "CoH Beta" or some such.
By the way, jsmill, what do you see when you back out of Icon to the old login screen? (which is possible)
If you see a creepy smile and floating face/head in the background, that's I24 beta.
If you don't see a creepy smile and floating face/head in the background, that's not I24.