Pimp your sound

The APP is not working for me. I have a iPhone X. My iOS 11.2. I followed the instructions but the instructions steps did not allow me to download ringtones to my cell from my desk top. “Windows 10” I understand that a couple of years ago, Apple removed a step in the summary section. APPS was removed, hence, I am unable to sync my ringtones to my iPhone. From my desktop. #HELP# Has anyone figured out the problem? Please let me know. Thanks.

TheBos1 about Pimp Your Sound, v2.6