The OP is right. I also found that every update now I have to re-setup and re-configure this plugin to continue working. This may not be as bad as 1 of 5 stars, but it is not the only problem.
PHP version: 5.6.34
WordPress version: 4.9.4
WooCommerce version: 3.3.3
Payment gateway: Strype
WooCommerce Manual Payment: 1.10.1
