User blog comment:Dragonjet/KC3改/@comment-25167612-20150503154223

As there are issues regarding the custom alarm, repairing it can be troublesome when I find out I lost my resource and sorties datas after it. If you want to keep your datas, DON'T REPAIR!. Instead, head to the extension page and look for the extension. Click on the details button and it will bring you to the store page. You will get a message that tells you that the extension is disabled, and next to it is the option to re-enable. Click that and you get to use KC3 again and keep your datas.

NOTE: This does not fix the whole thing as it will do the same thing again when the next timer rings. If you couldn't be bothered to repeating the process over and over, it is best not to use the custom alarm. Its even better if you remove 'alarm.mp3' from the folder.'DING!' works fine.