Darktable Images Opening In Task Bar At Bottom Of Screen

[NorthernHarrier]

I see that I cannot edit my original post, so I will add an update here.  I just discovered that the raw files I am opening on the new computer in GIMP are opening in darktable in a larger window, as they should - not only in a thumbnail in the task bar.  However, the problem is that the files are opening behind the GIMP window - so I cannot see them and cannot get to the "close" button (the "x") at the upper right corner of the darktable window to close it and allow GIMP to re-open the file for editing.  How do I get the darktable window to open in the GIMP program window, as it should, when I open a raw image in GIMP?