Hi Paco Marquez,
Thanks for your interest in Syncfusion products.
RibbonTabControl was removed from the Essential Studio version 4.2.0.60, Instead RibbonControlAdv is in use in latest versions.
If you could say us your requirement we can sort it out.
Further, You can get the information on latest version of Essential Studio at the following link.
Essential_Tools_Windows_User's_GuideUnder Tools Controls >> Office 2007 Controls >> Ribbon Control Adv.
Please let us know if you have any queries.
Regards
Vallarasu S.