gparted doesn't allow to run second instance

Attempt to run another gparted instance is rejected with

  The process gpartedbin is already running.
  Only one gpartedbin process is permitted.

As I understand this is done on purpose, but it is also painful. I have at least two use-cases
where I love to have two gparted windows open:

a) partitioning two different disks simultaneously
   (esp. when some partitions are to be pairwise identical)

b) partitioning new disk while looking at the layout of the old one
  (esp. when some partitions on new disk are to replace old disk, so it is handy to either match
   sizes, or labels, or both, or …)

PS Yeay, I know, I can run gpartedbin directly. But I decided to raise this as I think it is worthwhile to consider how to have more than one gparted window open *safely*.