Yes, but how do you get LastPass to regenerate a barcode from the Account Settings > Multifactor Options page. I tried to disable and then reenable LastPass Authenticator from within LastPass hoping that that would offer up a barcode but alas it did not.
When setting up the LastPass Authenticator you should get to a step where you can enroll your device with the LastPass Authenticator app: https://support.logmeininc.com/lastpass/help/enroll-the-lastpass-authenticator-app
There will be a step where you are asked to scan a code from your browser, and the code should have popped up in your browser. If you didn't see the code pop-up, please try again but first make sure all popup/content/ad blockers are disabled within your browser (as well as any other third party privacy extensions or extensions which may block popups) as we have noticed this can cause the code window to not correctly pop up.