If your Dashboards look like they are cut off or cropped either on an island or in the Manage Visualizations island, the likely issue is Microsoft Silverlight is on an older version. You can check this by going to:
Gear icon for options -> Manage Add-Ons
Once there, look under Toolbars and Extensions and then under Microsoft Corporation for the Microsoft Silverlight item:
Check the version number that shows at the bottom, circled in red. If this version is less than 5.1.40728, you will need to update your Silverlight.
You can update the Silverlight version at https://www.microsoft.com/getsilverlight/Get-Started/Install/Default.aspx