(Update) removal successful
I managed to remove the extension. Dreamweaver was crashing but it came back after the removal. It seems like Extension Manager acts as if it hangs for a while in some instances. It wouldn't even show "Removing Extension..." dark screen. But I noticed Activity Monitor showed otherwise so I let it sit and it eventually finished the job. Took it like 30 min to remove. Dreamweaver was crashing probably because the removal was premature.
The problem still persists, though. I haven't reinstalled the extension. I want this thing to work, and it seems like it does in some cases. Just not sure how I can get this installed right. Any support is greatly appreciated.