On first run please first use "Create DB", then "Create custom fields" (don't use them any other time unless you want to change the database).
The sequense of fetching the data is: "Pre processor", "Process data", "Post processor".
"Erase data" completely erases everything in the database.
After clicking a command please wait for it to load completely, otherwise you might damage the database.

DATA PROCESSING COMMANDS

Pre processor
Process data
Post processor

DATA ERASE COMMAND

Erase data

INITIALIZATION COMMANDS

Create DB
Create custom fields