As you already know, Leef iBridge USB 2.0 (older model) stopped working after iOS 11 update. Our development team has been working hard to find a solution for all iBridge owners and the good news is that we did it! You will need to update firmware for your iBridge using Windows PC. Please go here, select your language on top right, follow the instructions and your device will work again.
Please note that the tool is available for Windows computers only at the moment.