Okay here is a thing i notcied.
Let's say i have table "users" with fields "username" and "password" and i have that table selected in HeidiSQL (opened data tab).
Beside that, i have Workbench opened and meanwhile i modified "users" table and added one more field "grant".
When i go back to HeidiSQL (it still has "users" data tab opened) and hit F5 to refresh data, it crashes application. I guess it should refresh structure of table first then pull data again, maybe that's cause application to crash.
Thanks