Thanks, Andrey, for Your help! This is solved- I was able to delete everything! 🙂
Only now I have a one more problem from the same documentation..
I pushed the reset button as it is mentioned in last step. Everything else is deleted, but there is notice with information: Please contact WPML support. Screenshot in attachment.
It's possible that the notice you received is a false positive. You can try closing it to see if it disappears. However, if the warning persists, please follow these steps:
1. Check if the 'wp_icl_strings' table exists in your database.
2. If the table exists and the string is available in string translation, then we can confirm that this is indeed a false positive and the warning can be safely deleted.
3. To delete the warning, remove the keys "wpml_string_table_ok_for_mo_import" and "wpml_notices" from the options table (wp_options).
Before making any changes, please remember to back up your database first.