make fixes to Demag GUI reset_backend so that it works more comprehensively, add menu option to switch measurement files while Demag GUI is open, #550
make fixes to Demag GUI reset_backend so that it works more comprehensively, add menu option to switch measurement files while Demag GUI is open, #550
lfairchild/PmagPy,lfairchild/PmagPy,lfairchild/PmagPy