I've unscrewed the screws obviously, but now I can't figure out how to get the darn thing off the bass.

I can't pry it with my fingernails, and the thing only other thing I can think is getting some sort of tape and sticking it to teh cover and trying to pull it off that, but I don't know if that will mess up the finish. Unfortunately I'm not sure of the wood type or the finish. I've attached a pic though, so maybe you could help me with this. Maybe there's a special kind of tape? If not, any other ideas? Also as you can probably tell, I don't exactly know what I'm doing here, but I need to replace the battery, so if you guys could make posts super simple I would appreciate it

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Thanks a lot for your help!
(Sorry, no camera so I could only take a crap picture on my MacBook camera)