As you gave the feedback, I changed stop button to pause/unpause, added Add Time button
and some additional things, check it out
Stop it! Stop it! Added button to stop the timer :)
Completely new UI, also added option for changing default sound
Finally added hour option, sound notification when timer ends
Added option for automatic start on program launch
Link is fixed now, I forgot to share the file on Google drive
Finally you can minimalize the window, it's minimalized to windows tray, from there you can restart the timer, open main window, and exit the application.
Added loading last settings, also saving new settings, updated UI!