PS 27 update - all my shortcuts, actions and work spaces are gone

@bellevue scott 

Each Photoshop version has its own Settings folder under your Windows user account. This contains the full application configuration, every setting beyond clean, newly installed factory state. In other words, every new version starts with a clean slate.

Old settings may not be applicable wholesale in a new version with new code. That's why they're not automatically carried over.

If you turn off automatic updates you can prepare for this situation. First of all, you can choose to keep the old version installed. This lets you save out a lot of these settings to separate files that can easily be reloaded in the new version. Or you can do that in advance, before running the update. Actions and brushes should always be saved out regardless.

There is also an option to migrate settings as part of the update process. That is something I would actually advise against, for the reason given above. But the option is there.

The thing to be aware of with settings/preferences is that they are rewritten on every application exit. That makes them vulnerable to corruption from irregular shutdowns, but it also means that small errors will accumulate over time. Corrupt preferences usually look like application bugs and are frequently mistaken for that.

@bellevue scott did you not "Import Previous Settings" option was checked during the update? You can try to roll-back to the previous version? Unless, you checked removed old versions, if you didn't, you can go to ytour Preferences - Adobe Photoshop [Old Version] Settings. Look for folders named "Adobe Photoshop 202x Settings"