[Dx4win] Use of "Selection" function

[Eric Rosenberg]

As the government shutdown leaves me with time on my hands, I've begun
working on my DX4Win logs.

I've imported a couple of contest files, forgetting to set the group
number/name in the PREF file before doing so. Likewise with the QSL label
setting.

I've gone through Jim's excellent tutorials, but am not able to change
these two parameters.

Basically speaking, I want to change a specific group of QSO's (defined by
date) group number/name and/or QSL lbel information.

It should be simple, but somehow isn't.

Any help is appreciated.

73,
Eric W3DQ
Washington, DC