v1.2.1 is now available to download from the Plugins section, correcting the upgrade issues from versions prior to v1.2.0.
Anyone who has installed the 1.2.0 release can correct those issues by copying the following into the admin's
Tools :: Install SQL Patches
Code:
UPDATE configuration SET configuration_value = '1.1.0' WHERE configuration_key = 'MODULE_PAYMENT_PAYPALR_VERSION' LIMIT 1;
Once that's been run, navigate back to the
Modules :: Payment page and the PayPal/RESTful module will update (properly) to v1.2.1.