Pode
I made the change on my copy of your plugin so it reads accordingly. Here is the change I made to the runtime starting on line 133. This allows me to load a csv file and hook into rex's csv plugin. Feel free to make the change :)
if(this.file.name.endsWith("txt")
//|| f.name.endsWith("log")
|| this.file.name.endsWith("xml")
|| this.file.name.endsWith("svg")
|| this.file.name.endsWith("csv")
//|| f.name.endsWith("tmx")
|| this.file.name.endsWith("html")
|| this.file.name.endsWith("htm") )