I've run into numerous issues when trying to upgrade from EasyStore 1.3.4 to 1.4.0.
At this moment, users should NOT perform the upgrade!
Issues experienced so far:
Installation error (duplicate SQL column) when upgrading to 1.4.0 from 1.3.4 - https://prnt.sc/wjIhauhftl2M
Issue when trying to open existing product - https://prnt.sc/42-u9CMbMVxb
PayPal plugin is completely changed and so will not work until re-configured - https://prnt.sc/1owqcBvE7k9k
ENTIRE WEBSITE FRONT END BROKEN - https://prnt.sc/7Wv3lXc8tNBQ
Once again, it is extremely disappointing that another version of EasyStore has been released without even basic testing!