Thanks Tyson, I've enabled this and square is available as a payment option now, but I'm testing this out and it appears there are v2 sandbox api's square has now and the integration only works with legacy sandbox api's (depreciated)? if I move to the live square system blesta does not support it gives errors "missing required parameter"?
Assuming the extension needs to be updated to support v2 APIs for Square integration
https://developer.squareup.com/docs/testing/legacy-sandbox