Yes, the fact that you bought it from the app store makes a difference. I can tell you what should work, but in the app store version it's iffish. If it doesn't you can delete PSE (app store version, just send entire folder to trash), go to App Store>Purchased and download again. You won't have to pay again.
Go to Applications and right click Adobe Photoshop Elements 10 Editor>Show Package Contents>Contents>Application Data>Photoshop Elements>10.0>Locale>en_US (or your location). The app store version is different because apple requires that everything for the app store programs be contained within the package itself. I'd be interested to know if deleting mediaDatabase.db3 works for you. It doesn't in PSE 9, but it should in PSE 10, but results have been variable.
I tried deleting mediaDatabase.db3 but it didn't work. Thanks for helping me find it though.
I've just deleted it and am re-installing it. Hopefully this does the trick.
I tried the re-install but that didn't work either.
It looks like the old info from before the re-install was preserved (ie the custom gradiant map was preserved).
Have I incorrectly done the install? Where would I find the files for the custom info?
Forgive me..but I'm still used to a PC
Ah, try this then. Go to your username>library>preferences and delete com.adobe.pse9editor.plist. That library is hidden in lion. To see it, in the Finder, click the Go menu and hold down the option key. It will appear below the little house for your user account. Also, while you're in that library if you use lion, go to Saved Application States and delete anything for PSE.
That did seem to work....any other thoughts?
I stupidly made the same mistake with the exact same setup. However, I smartly found how to reset presets without re-downloading.
With the Finder menu bar open, click 'Go' and hold the 'Option' key to show your user's Library folder and click -> Application Support -> Adobe -> Adobe Photoshop Elements 10 Editor -> Trash 'Presets' folder.
When I relaunched Elements 10 (although it took a bit to launch), the bevel preset I deleted was back and all my presets were restored to factory defaults.
Thanks for the help...I tried it but unfortunately it didn't work either.
Okay...I figured it out.
It was a combination of a few different solutions.
Long and short of it, I had to un-install the program and then delete all traces of the program from the computer. I went through the package contents on the program directly and fiddled around
I did it a few days ago and now I'm not exactally sure which folder I deleted, but I believe it was:
Application Data --> Photoshop Elements --> 10.0 --> Loacle --> en_US-->photo creations --> Layer styles-->Bevels.asl
Deleted that...might have deleted the entire Adobe Photoshop folder from the Library.