Several benefits can be derived from having a user community associated with an experimental wireless network, such as access to real user's network traffic. However, to ensure continued use of the network, it must provide acceptable levels of service. The software deployed in experimental networks is subject to high rates of change, which can lead to down-time. Often these experimental networks, so-called Living Labs, are deployed in remote locations with restricted access to hardware, and are in-part administered by non-technical users. This suggests that a mechanism is required by researchers for reliable and remote updating of the software on a Living Lab network. In this paper, we describe the design and open-source implementation of MeshUp - a novel reliable software update mechanism for network devices in a wireless mesh network. MeshUp will play a key role in our research by allowing us to remotely deploy new software and maintain acceptable service to users on the Wray Living Lab, ensuring its sustainability.