Simply drag the Portfolio EA from the Experts folder in MT into the Validator in EA Studio. Remove all acceptance criteria, and start the Validator. All of the strategies in the Portfolio EA will go into your collection. From there, remove or change any strategies you do not want, and move the rest to a Portfolio. If you have existing strategies in your Portfolio, you can either remove them, or keep them there if you would like them to be part of the Portfolio. From there, export the Portfolio EA and copy it into the Experts folder in MT, and attach it to a chart.
Remember to delete the old one from the Experts folder, and close the chart it was running on, or just apply the new Portfolio EA to the existing chart if it’s the same asset, and overwrite the older one.
Hope this is clear for you.