Commander or Explorer Interface

Awesome program. Been using it for years.

I've often wondered which interface is more popular. Are there regional differences in preference? Does supporting two UI formats make development more difficult? Which UI does Martin use?

The Explorer interface is currently used by only about 3% of users (with decreasing trend).
As it is basically a subset of the Commander interface, it makes the development only little more difficult.
I've never checked regional differences.

I'm one of your 3% :D