Is the upgrade: Xara Designer Pro X v19 ==> v20 (perpetual) worth it ?

[shiphen]

'circular radius' - do you mean arcs of a circle with a given radius ?

Apologies what I meant was the creation of what engineers call a "fillet".

i.e. Where you have a sharp corner where 2 straight lines meet and you want to round it with a simple curve that has specific radius.

e.g. This sort of thing: