So ya. If you're absolutely sure it's all installed correctly, and it's not opening, then no, I have no idea, it should all work.
I guess it can't hurt to provide the full details here one more time.
1. Place the 32 bit files (1a) in the 32 bit folder (1b) and start the 32 bit version of OBS (1c).
-or-
2. Place the 64 bit files (2a)in the 64 bit folder (2b) and start the 64 bit version of OBS (2c).
3. Once started, click plugins, select the scene switcher and click configure to set it up.
The single most common reason for this plugin not working is due to mixing up the steps in 1. and 2. For example people do 2a 2b 1c, or 2a 1b 2c. While the only correct sequences are 1a 1b 1c, and 2a, 2b, 2c.
If that's all correct, and it still doesn't work, then it's best to check a log file to see if OBS is attempting to load it. If this fails, then it might be time to take a look into it more closely. If it's not even trying to load it, then the dll is not placed in the correct place.