Well.. I use PSEv2 with Win7. For me to get a bendy line.. I either have to draw it by hand (not pretty) or use a combination of squashed circles/ellipses to achieve the desired (and sometimes NOT desired) results. Whatever it was Garry used to use, he could draw a line then bend it using nodes and finally.. a smooth command would do the biz. TBH.. PSE is for photo editing not painting but it's served me reasonably well for many years.
ATB
DaveB