HeidiSQL not responding when execute deleting row after mouse over window

HeidiSQL not responding when execute deleting row after mouse over window

please check this video https://www.awesomescreenshot.com/video/15494049?key=0fc61d9ece5821c10139b2c9d13d9d33

HeidiSQL is just busy with deleting your 9.000 rows. Deleting rows in a grid does it row per row, and blocks the main thread for the time. I highly recommend to delete many rows either in the Database tab > "Empty table", or via custom query: DELETE FROM mytable WHERE code IN ('xyz')