What file type are you using jpeg or raw? The profile you are referring to is for RAW files only.
I'm shooting Raw.
I actually posted the wrong directory above - The above directory was installed earlier today when I installed the ACR & DNG Converter program - and that created the directory above - which DOES contain my len's Lens Profile.
So - my Lightroom 5.7.1 actually DID NOT have my len's Profile.
NEW Question: I then copied my len's Lens Profile from the Camera Raw folder and pasted it in the Lightroom folder C:\Program Files\Adobe\Adobe Photoshop Lightroom 5.7.1\Resources\LensProfiles\1.0\Sigma\Canon
I am still unable to see my Lens in the drop-down menu.
Thanks so much!
OK - I figured it out!
I pasted the lens profile into:
no other profiles were in it - but after pasting the profile here - it showed up in Lr... YAYY