Just update the particle, we’re working hard to avoid the issue when updating our particle package for customers but I recommend update the template layout first before updating and contact our support via private ticket https://joomlead.com/ticket-support/ if you face any problems.
You can do it now.
Important: Backup your site before updating, some particles changed the structure that related to Uikit3 framework. You can check the particle that require Uikit3 here https://joomlead.com/gantry-5-particles/.
We are working hard to implement to particles version 2 for existing templates.
If you found any issue, please submit the questions via our ticket system