Hi,
I'm afraid there is no *.exe for KioscEditor, it is build only for the store.
Can you tell me what happens when you try to install from the Store?
I've noticed that for non-paid apps, you can click away the login popup that appears when you click "install". Just click on the X. and the app will install anyway.
Let me know if you have any more issues,
Greetings,
Bootsy