From my perspective, below is what I did:
1. Upgraded to 7.0

2. I noticed one of my plans (file based, encrypted, to a local storage account) was "Not Scheduled" even though it previously ran every night.

3. I clicked the start icon, and it immediately started a "Full (first run)" backup.

4. When I looked in the local path for the storage account, I saw under CBB_Archive that a new directory was created for the backup. The dir name was a UUID, instead of reusing the existing directory named for the backup plan.

Hope this helps!

it was a file-based plan

I had a local backup plan that was running incremental daily backups since June. With the install of v7, it forced a full backup from scratch in what appears to be the new format (based on the backup directory naming)

It seems all of my backup plans were updated to the new format and full backups forced? That was definitely not expected, or wanted.