I'm really sorry for the negative experience bug, but if you get a lower amount of experience than before, it was because I changed the formula to gain experience. The new formula make experience harder than before to gain. If you got a negative amount of experience on reset, it should be fixed now.
Sorry for the inconvenience, and thanks for playing! :)
If you want a step-by-step walkthrough for a specific site or a conversion example (e.g., .vtt → .srt with ffmpeg/Subtitle Edit), tell me which site and format and I’ll provide exact commands and steps.