Hello Christian
I've been testing the FDT_HELPERS functionalities and unfortunately they don't seem to help (regenerating functions from the applications -> no changes to attributes, xml export from dev plus import in test system -> import errors, transporting the application -> not actually possible as per system message ).
What I did see though and it could be a start, is that I can delete the application using transaction BRFPLUS as you suggested and then regenerate the same application in SM30 for CRMV_ISU_BRF_APP (the generate button appears after deletion in BRFPLUS). The new attributes are still not available but I guess I'm missing a step.
Please share any other info or suggestions.
Best regards
Razvan Zainea