Trying to import/export keyboard shortcuts to new computer

It's a copy and replace process. You have to make a copy of your settings folder (or the parts of it that you want to replicate, at least) and replace the existing folder with the copy - you can't just import the settings. By default the path to the settings section is hidden, and you may have to unhide it to reveal it.

The path for PCs is

C:\Users\{username}\AppData\Roaming\Adobe\Audition\{version number}\

For Mac users, the equivalent path should be

/Users/{username}/Library/Preferences/Adobe/Audition/{version no}