The big thing on time is that we understand many folks can only use their machines evenings/weekends/holidays, so do our best to staff the support queue during those times.
The Cut Vector command was added in build 627:
627
(NEW) In node edit mode, right click to cut a vector.
You should be able to download v6 alongside v5, so long as the programs have different names (this has to be done manually on Mac OS)
You may want to try the new v7 beta as well (I’d be sure to install v6 just to have it):