webCoRE for Hubitat Updates

I installed WebCore yesterday on my new C7, and then logged into WebCore, and all of my pistons that I've been using on SmartThings were there.

I had assumed I was going to have to migrate my pistons over from WebCore SmartThings Land. Should I assume that I need to create a new account/login from Hubitat WebCore and start from there?

NVM, their gone now. Odd...I wonder what happened yesterday...

I tried several times to import a piston (restore a backup using code from my SmartThings WebCore, and it always comes up empty w/the message below. Is restoring from backup code the right way to bring in pistons from SmartThings WebCore to Hubitat WebCore?

Does getting pistons over to Hubitat require using a file backup of the pistons?