While working with USB Redirector TS Edition you can receive warning messages. In that way USB Redirector TS Edition notifies about some unusual or important situations. Such notifications usually require you to click OK in the notification window. If you do not want to receive notifications about a particular event anymore, you can uncheck it in this window.
If you change your mind and wish to receive notifications again, please click Settings > Preferences menu item and switch to Warnings tab. On this tab you need to check the notifications you wish to receive in future.