CSV file from product exporter contains unused meta columns

Hi,

I installed an ebay plugin several months ago that created about 30 meta columns in my products when exported with the built-in csv file. I fully deleted the plugin together with any tables in the phpMyAdmin but the columns are still there, and now I can’t export my csv file – it just freezes and I assume this is because I have too many meta columns that I can’t delete. Could you please tell me how I can control which meta columns are exported and ideally delete the ones that I don’t use anymore, as the exporter just seems to be downloading all meta columns that affected the products at some point.

Best regards,

Nikolay