Make sure you are logged into a Salesforce administrator account.
Enter the Setup area by clicking Setup at the top right of the page.
Under the Build menu, expand Customize and then expand Opportunities and then select Page Layouts.
Click the Edit button for the page layout that contains the CloudShare Invitations section (which contains the CloudShare Invitations Visualforce page).
Remove the section containing the CloudShare Invitations Visualforce page.
Click Save to save the page layout.
Under the Build menu, select Installed Packages.
Click the Uninstall button next to the CloudShare Invitations package.
Scroll down the page and select your preferred option for saving package data.
Click Yes, I want to uninstall this package and permanently delete all associated components to confirm that you want to remove the package.
The uninstall process begins. When the process is complete, the package is removed from the list of installed packages and is displayed in the list of uninstalled packages. You may need to refresh the screen to see this status change.