Beckhoff visual ipc

I am using a beackhoff twintcat system 2.9 in which the HMI screen is developed in visual.
acn anyone help me out that how to edit the individual screens as when i am opening the exe file directly the visual project is coming with no edit options

You need to have the original .pro -file and then edit using Twincat PLC-editor, which is available free of charge at Beckhoff's website. You will then need a license to export the hmi as a stand-alone application again.