How to delete an installed external app

[kopwei]

I installed Omega on my numworks calculator and installed external app "Periodic" and "KhiCAS" via web. But I found no matter how I re-flash the Omega image, these 2 apps always exist.
I tried flash back to factory image and re-flash Omega, these 2 apps are still there.
Is there a way to get rid of them?

[mkolassa]

I have also been trying to figure this out. Does anyone know?

[fime-space]

Try installing no app