Hi Rui,
Thank you for your kind words about Baculairs. It motivates us to work :-)
For your question about keeping the columns permanently, yes, it is
possible. To set the columns as permanent, please go to the
application settings (gear wheel icon at the top left) and there on
tab 'Display options' in directive 'Keep custom table settings' please
select 'No time limit'.
I am attaching a screenshot that shows it.
Best regards,
Marcin Haba (gani)