>>No, I installed Rainloop from Webuzo. I didn't use the default path since I installed it in a directory belonging to a subdomain as you can see in the attached screenshot, but I used the Install button from Webuzo.
In my previous reply, I mean't that Rainloop if installed on your server then you will be able to see the Backup option. Webuzo currently doesn't have backup option for system applications. But we have added this to our to-do list.
Let us know if you have any further suggestions or queries.