Find column is too slow in CSViewer

Hi,
I use CSViewer with CSV files with many columns, like 400 or even 1500 columns.

When I type a character on Find Column box it takes ~20-30 seconds to open the listbox.

It would be great if that feature works faster.
Thank you very much for your great product!
Regards

Thank you for reporting the problem. We're looking into it.