Edit: There actually seems to be an issue with Flash not correctly downloading and updating through flashplugin-installer. Don't ignore it! Check my answer.
I'm apologize if the answer is extremely straightforward, but my flash needs updating, and I'm unsure how to do that.
I installed Flash initially through the Software Center because if I download an executable file from, say, the Adobe website, I'm at a dead end. It doesn't start the install automatically through some gui interface, and I don't know the command line to install it. So, that's my problem now - I'm at a dead end if I just download the new version of Flash and update through the Adobe site, but I don't see anything in the Software Center that says "get updates."
Thanks for any help you can provide.