That's good enough for me      Ta muchly

SD and a cheap Chinese satnav = Jobzagoodun.

SkyDemon should accept degrees and decimal minutes just fine. As a test I just tried entering a lat/lon in the create waypoint window; what I entered is below.

N5000 W00200

Kind of ties in with my point in my post http://skydemon.aero/forums/FindPost4258.aspx - I would like to see the waypoint entry accept all of the common formats, after all it would be quite easy to determine which format the user has used, they all have different numbers/patterns of digits.

SD understand either ddmmss format or radial in degrees and distance to other existing point, ex NDB or VOR.

I am afraid you need to make conversion from other formats yourself. If you are not sure how to make formula in Excel or calculator, you can find many format converters on Internet. But probably you will need to convert one by one.

Hoping this is a practical proposition. 

I have a couple of dozen waypoints that I'd like to load into SD, on both my planning PC and my mobile unit, they are listed in degrees & decimal minutes format. 

Is there a method to import these waypoints without having to rearrange format etc?

SD and a cheap Chinese satnav = Jobzagoodun.