Both the editor in the simple file manager and the editor in the advanced file manager save text files with Windows line breaks (cr/lf) instead of Unix line breaks (lf). This causes problems with many services when you edit their configuration files.
The problem happens with both Firefox and Chrome on a Windows or Linux(!) client with CWP Pro running on Centos 7.6.1810 (Core).
I noticed this because Midnight Commander shows ^M at the end of each line.
Otherwise I'm very happy with CWP Pro!