Private events can only be hidden but not overwritten.

[AJOCHAM]

Added the following 2 sections to your code.

line 34
overwritePrivate: false, overwritePrivateText: "--Private--",

line 620
`
else if (this.config.overwritePrivate) {
if(event.class === "PRIVATE") {
event.title = this.config.overwritePrivateText;
}

			}

`