This release has only one purpose. To support both HTTPS and HTTP. Currently https is not used, but who knows how long this will last. For that a new option in the settings was added. HTTPS mode. By default this is enabled. In situations like these, where https is disabled, you can also disable this checkbox, to be able to go into HTTP mode.
Keep in mind that the disabled HTTPS mode will only work if com2us has https disabled on their end as well.