I recently received a computer from our department and tried to open .m files. (R2017a) Whenever I double-clicked them, they opened in new windows. But these new windows do not include the new .m files that I tried to open; they still had the old tabs that were open already. I also tried to drag and drop .m files to MATLAB window that was open and it didn't let me open them, showing me a circle mouse icon with a cross in it. My labtop has the same version of MATLAB (R2017a) and the things I mentioned above do not happen at all. Can anybody help me with this issue?