Upgrade From 4 - 5 and CSS

Hi, We have been able to convert our project from Mendix to Mendix 5.11. But when we run it the old Styling/layout is all gone. How do I keep the old styling? Can anyone please guide? Thanks, Sharad
1 answers

Mendix 5 adopted Bootstrap as its main css framework. Therefore all Mendix classes are renamed to conform to Bootstrap's naming conventions. By dropping support for Internet Explorer 6 and 7, we were able to simplify the DOM structure of widgets, which makes styling a lot easier. However, this also means that theme packages from earlier versions will not work with Mendix 5.