Hey @ric_chin,
My name is Liao and I am the marketing director at Seeed. I am sorry for the inconvenience caused. There were quite lots of faults on DSO Nano v3 need improvement. Your feedback is really useful. I will talk to our engineer and work out a solution ASAP.
If you are not satisfied with current one, please let me know and i can issue a refund if you like. Sorry again for the bad experience. We will continue to improve our products and service.
Leslie Liao