Hi Paulius:
1. the conversion windows are used for the gap between the experiment exposure event, and the metric event (or at least the datetime in the metric query). So if your metric is not related to the experiment exposure event, you can leave the initial delay to 0, and the conversion window to something high. If you do want to see how they use the app within the next 7 days after exposure to the experiment, you can set this to 7 *24.
2. Phase filters apply a date range. So we’ll ignore all experiment exposure events that happened before that time window.