Menù and 'manage database': open, create or delete your database file. Addon creates a folder named 'valueyourtime2020' within a Spreadsheet file. So you can easy edit it
Select a calendar, from, to and then download calendar in a spreadsheet file.
Add 5 column to set customer, practice and time used. Insert value for hour and then calculate.
Calculate your time and take a resume.
Menù and save analysis to do statistic
Menù Run Analysis and read statistics.