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all Telerik ASP.NET controls and versions
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Update Telerik's controls to another version or license.
Below are the instructions on how to upgrade Telerik's UI for ASP.NET AJAX (formerly known as RadControls for ASP.NET AJAX) to another version or license. The shortest list of steps for upgrading the application itself is available in this blog post: Upgrade the Version of Your Telerik ASP.NET Controls in 6 Easy Steps. If you need more detailed instructions, continue reading this post.
4. Download the HOTFIX ZIP (aka DLL, Scripts and Skins only) file. Before the download starts, the page should look similar to this screenshot:
Make sure that you do not specify the version through the fully qualified name of the following http handlers/modules in your web.config file (thus they will operate properly with each new version of Telerik.Web.UI.dll):
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