We are happy to say that we have been working on macOS High Sierra since a while and there is no known issue with the latest versions of our applications. If you want to upgrade, we recommend as usual to have a backup readily available so you can revert back just in case the upgrade does not go as smoothly as it has been for us. If you do so, and you are using a serial number, remember to deactivate your serial number before booting from a backup hard drive.
If you are using a dongle, make sure to update your Softron application to the latest version available from the downloads page (the ones released after September 10th, 2017) to ensure that your dongle license will be seen.