iPayment 2019.4.0 is now released.
Get it here: https://download.boyum-it.com/iPayment/
2019.04 [01. April 2019] - Fixed Features - Fixed that Authorize and Settlement screen did not show credit card details on documents that was linked to One-Time Credit cards - Fixed that iPayment did not remove its menuitems when you manually stopped the Add-on. [TFS20680] - The Square gateway selection form now validates that the Merchant ID is filled in before starting the OAuth flow