When I have added SF Devexpress Standart and Maintenance Form templates to my project.

I 've got version conflict error (Error : Dev Express Util v6.3 can not be added to project)

But I've compiled the Inherited UI (Project). Update the toolbox. Run the samples that requires Dexexpress.

To update project templates, What will I do ?

Check the posted releases section later today (http://forum.strataframe.net/Topic13284-22-1.aspx) and I will post another install that has the templates up-to-date.  This is easier than trying to explain how to go update your templates.  I have already made the changes and am performing a build as I write this.

Our devexpress version 7.1.X. You've said that you have updated 7.3.5. Does it work properly in this case ?

Yes.  The updates are for the 7.3.5 version.  If you wish to use a previous version then you will need to make the changes manually to the templates as well as the references in the Inherited UI assemblies.