Our school has a denford microrouter which is connected to a PC which is running VR Milling 2.1 (1999). I understand that this version is now quite old and today I tried to upgrade to the current version of VR Milling 5. However when I try to run VR Milling 5, a message pops up saying dongle not fou...

Router motor on our microrouter compact is doing some funny things. Making some unusual noises (high pitched screeching) and appears to be revving up and then slowing down erratically. Could this be an indication that the bushes need replacing or a dead motor?

Paul