Downloading & installing the “Admin” version of FlowBreeze (after uninstalling existing version) DID add the FlowBreeze tab to the Excel menu.
As with other users, it took 2 tries to validate the License Key: 1st attempt stated “Not valid for this version” – but 2nd attempt returned “You have successfully registered…”.
And, again, as others have noted, had to Close & Reopen Excel to get the “(Trial)” notice removed.
Now just need a likely use for the add-in….