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You can set Python Executable in Project Properties, from the Project menu, to tell Wing which Python installation or environment to use. In general we recommend using one per project and use Projects > Recent to switch quickly as needed. With Launch Configurations you can use multiple envs in one project in various ways, like setting up different Python envs for different unit test files, but code analysis, error checking, etc, all only use the main env.
I don't have any info specific to ArcGIS but I know Wing is often used with that and from what I'm finding online I think it's just a question of setting up the Python env. Please let us know if you have other questions or this doesn't help.