Hi, Jouke Wijdoogen

Firstly, I would like to sincerely apologize for the delayed response as we have been experiencing an unusually high number of tickets. I am sorry that it has taken longer than usual to respond to your concern and your patience is highly appreciated.

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If you're storing the user ID in the file, you can use the "Users see and edit their own data" feature so only the data related to their user IDs is displayed. 

There's no possibility to enable chart-editing. The charts are created from existing tables.

 If you want to enable filtering for charts, you need to add the table and the chart on the same page, and enable "Follow table filtering". This will allow customers to filter the chart. 

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Additionaly, if you need documentation to see how tables can work with CSV:

Please check this page for tables linked to CSV;

and here to see how you can import data from CSV to make a Manual table in the database;

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We don't have a trial version, 

but  we have a sandbox/Demo site (https://sandbox.wpdatatables.com/), that you can use to try out some of the plugin's features;

and there is a 15-day money-back guarantee period,
so if you purchase the plugin, you can safely fully test it out,
we will assist along the way,
and if it doesn't fit your needs you can request and receive a refund in that period.

Let me know if you have any questions.

Hi, Jouke

Sorry about such long waiting time.

- I will also reply to the other ticket,

and please let me know if you have further questions regarding the points we cover on this ticket.

Thank you.