both are good.
I'd go for dotted:
2.0 would be version two release.
then after some days you make little addon to it.
I don't like to see then the program to be:
2.01 or 2.1

nicer and more "understandable" would be after such little adjust:
2.0.1

I think this way the version number says: "I include minor improvement"
_________________________
!

download KiXnet