The issue with your srt file is a period is used to separate the seconds from the milliseconds. SRT files should use a comma instead of a period as the separator (you can google "srt period or comma" to see the standard for srt is to use a comma). For example, change "0:00:03.500 --> 0:00:13.290" to "0:00:03,500 --> 0:00:13,290". I can probably add some code to recognize the period as well in the next update.