I'm using a Space Explorer USB with SW2018 and have no issues though the software does report it as a discontinued device. I've also just added a CadMouse Wireless which has not upset the applecart in any way. Sorry I can't offer any help other than the fact it can work with SW2018.
Thanks for your info.
I finally managed to sort this out after a lot of messing about. In the end I downloaded the driver 10.5.6 which is not meant to work with my SpaceExplorer USB, it installed OK and low & behold, everything works!!!
I must admit though, I am very disappointed at the lack of response that I had back from them.