After installing the latest update to Radzen Studio, I'm finding that the CRUD pages that are created with "Use advanced DataGrid filter" ticked doesn't create a DropDownDataGrid but instead creates a DropDown control
The "Use advanced DataGrid filter" checkbox enables advanced filtering mode in the RadzenDataGrid. To use DropDownDataGrid in CRUD pages you should check "Allow paging, sorting and filtering of lookup data".
Sorry, was too hasty. Must have been on autopilot each time I ran it before the update and just assumed the update had broken the code generation. Sorry guys.