Hi Bod,
In the last improvements of outsystems, they reduced the time from a month to 10 days.
This is the configuration file.

"In the newly published page on What's an OutSystems personal environment the following is written:Yes, completely free.Your Personal Environment will be available:As long as you continue developing your apps.Your apps are consistently accessed by end-users.If you stop developing in your Personal Environment for an extended period of time, your Personal Environment will be recycled. This allows saving resources for other developers. But don't worry! Long before that happens, we'll let you know. We'll send you emails remembering to continue developing in your Personal Environment.If your environment ends up being recycled, we'll create a snapshot of the applications you had. We'll send you an email with instructions on how you can restore your apps in a new environment. Keep in mind that we only take a snapshot of the applications, not the data, and also, the snapshot will be available for the next 6 months."
You can read it here.
https://www.outsystems.com/forums/discussion/76842/why-is-my-personal-environment-being-put-to-sleep-every-week/#Post316992
Best Regards,
CP