Ladies and Gentelmen.. after playing around with this for many hours I now have the problem too.
I cleared all of my previously installed JMRI 4.18? (registry and all)? and then installed 4.18. I made sure to install for everynone
I open my Roster entry and Windows Explorer and try to Drag & Drop an image file ( with which I had absolutely no problems in the previous JMRI 4.18 install )
Now the minute I try and? Drag & Drop the image. the minute it leaves the bounderies of Explorer, the Image changes to the circle/slash? and I can not complete the DnD task.
I have no idea why nor how I did it, but I now have the problem to play with.
Marc
