How can curves in the plot remain so that they are there when the program is restarted or a new window is opened?

Do this if you want to start up the program with one or several reference curves present.

The automatic save of the Plot Settings settings must be turned off since it will delete the curves. From Plot->Advanced Plot Settings…, make sure is not checked. If the layout settings are saved manually from the Save or Save As… button in the same dialog box (Plot->Advanced Plot Settings…), the curves will be deleted. To avoid this happening, perform the saving to the *.tee-file from File->Save Active Plot As…. Find the folder where WinMLS is installed and select the folder named Chart. Then select the folder corresponding to the plot type you are currently using.

Note that when is not checked, temporary .tee-files are not saved. This means that the settings that belong to the Plot Settings will not be saved when the program is exited or on File->New Group.