On the VL website, there is a utility called VL manager. In theory,
it appears that one can use this to load in a selection of BGA
turnpoints to that software, and then use the utility, and a lead from
PC to VL, to upload them into the VL.

Unfortunately, I have been unable to easily see how to selct a
suitable number from the BGA list (the VL can only accept 500 I
believe) and to replace the existing old turnpoints loaded into the
VL.

Does anyone have instructions, in English, which can be followed by
somebody who is not a computer expert?

Chris N