The hypens are just that hypens. You should be able to cut and paste that string as is, with a couple of caveats.
Open a Mac Terminal window. You will need to save this “keystore” file to some place on your computer where you will remember where it is and can find it later. On a good note, once you tell Corona where it is, it should remember it, but still, you need to think about where you are when you run the command.
So from the terminal do the command:
pwd
This will show you where your current directory/folder is. I normally don’t like to put random files in your “Home” directory, but in this case, it’s probably a good place to put this. You should see “/Users/robertlewis” output by that command. Next the string:
keytool -genkey -v -keystore bluebear.keystore -alias bluebear -keyalg RSA -validity 999999
I’m not sure if you put the words “bluebear” in there or you got it from someone else. You can use the name of your app in place of “bluebear” if that’s not your app. Run that command from the $ prompt in the terminal.
Next in Corona SDK, do your Android build to bring up that dialog. Where it says Keystore: debug. Hit the “Browse” button and navigate to your “Home” folder. You should see a file there named bluebear.keystore (or whatever you named it). Select it and click on the Okay or Open button. In the next dialog below, you should be able to select whatever you put for the alias above (in this case it’s also “bluebear”.
Then finish the build as normal. These should be saved for you when you do your next build.