How do I specify the name of the intranet? We don't want to call it "Simpplr"

This has to be done by App Manager.

To change the name of your intranet:

1. Click on your avatar at the upper right hand corner, go to "Manage Application".

2. Under "Setup" > "General", you can specify the name you want to use under "Application Name" and "Application page title".

If you want to change the Simpplr tab name in Salesforce, please follow instructions in this article.

If you have Winter 17 Release, your Application Name will appear in the global search box at the top.