You should have already been provided with a URL for installing Cloudapps Sumo for Salesforce package; please contact Cloudapps if you have not received it. To begin the installation process, click on the URL link (or paste the URL into your browser address bar).
If you aren't already logged in, you will be re-directed to the Salesforce.com login screen and prompted to enter login credentials for the org into which you wish to install the application. Log in using your System Administrator credentials to begin the installation.
Following a successful login you will be presented with the "Package Upgrade" screen.
Select the "Install for Admins Only" radio button
If you would like to see the full details, click on the "View Components" and "API Access" links at the bottom of the screen.
Click the "Upgrade" button:
The upgrade usually takes several minutes to complete, and you will typically see a message indicating this. In these circumstances, you will receive an email notification message once the upgrade has completed.
Once the upgrade to the latest Sumo for Salesforce Version 8 release has completed you will be able to continue with the Post-Upgrade Steps. A System Administrator must complete the Post-Upgrade steps described in the following sections before using the package.