Hi Bobby,

Before give you the list of the steps on what you can do, can you answer me few questions:

• Which is the product you are using, Windows Forms?
• Have you use and develop a functionality based on the new features and components that are introduced after 11.2 ?
• What is the reason to downgrade, usually we recommend upgrading? 

Please note that not all of the functionality can be downgraded as you know that the new versions contain new features, fixes and improvements in our toolsets. And you might lose some behavior in your application if you are using the new features.

Please check in our documentation in the revision section what are the new changes for the versions after 11.2 that you will lose downgrading the product: http://help.infragistics.com/doc/WinForms/2014.2/CLR4.0/?page=Win_Revision_History.html

A straight forward manual downgrade for Infragistics Windows Forms in case you are not using anything new in your application will be simple. 

1 Install the desired version with the Service release.

2 Change all the references to your project to point to the desired version.

3 Remove all references to previous assembly versions from the project's References folder.

3 You might need to change the target CLR, I guess you will be using other CLR version then CLR4?

4 Then try to build the app and see if you got any complication errors.

You could also try to use Infragistics Version Utility, but automatic downgrade might not be possible if you are using excel and documents dlls.

 And don’t forget to archive the application before start making this changes.