For more information navigate to: https://docs.connectwise.com/ConnectWise_Control_Documentation/Technical_support_bulletins/Changes_to_extension_development_process#Register_for_an_extension_developer_instance
In order to develop extensions on-prem or from a paid cloud account, please fill out the form below then:1.) Signup for a free cloud account (this can be off of a trial).2.) Send the cloud instance url to firstname.lastname@example.org.) We will then apply a developer license to the instance you provide (this account will act as your dev instance)4.) Upload your unsigned extension files into your dev instance via the extension editor5.) Submit the extension for a revision in the typical fashion6.) After you submit your revision we will get a notification and send back your signed extension files via email-you can then upload your signed extension files into your production instance.