Path lines and arrows changed from solid to broken

[PaulH]

I've been using Gimp for some time (this forum has been invaluable) and lines and arrows I drew with path were always solid.

They recently they changed to broken lines for no reason I can account for, the breaks varying according to the orientation of the line.  Try as I might including looking at how to create broken lines I have not been able to get the solid lines back, advice please.

I'm attaching examples of how they used to be and how they are if drawn now.