The Softaculous Team has launched Softaculous 5.1.3 in Stable branch
1) [Feature] : Added support for Softaculous Reseller panel in Plesk.
2) [Task] : Added setting in Softaculous admin panel for Staging max limit so the admin can restrict maximum number of staging installations allowed for a user.
3) [Task] : Allowed admins to configure installing custom plugins from edit installation page.