I built a multisite network and it got broken due to a developer who now claimed that it can't be fixed: The subsites' dashboards can no longer be accessed and the pages give the error message "page cannot be found". Since I haven't worked on it for very long, I am fine with "abandoning" the site and restarting.
Right now, I would like to move all my installed plugins (paid and non-paid ones) from this site to a new single site installation (not multisite). Is this possible? How do I do it?