All the information about each [[EM.Cube]] project are stored in two files which bear the name of the project and have file extensions ".PRJ" (project file) and ".MDL" (model file). When you run a new simulation, a large number of files of different types are created in the project folder. Some of the output data files have reserved names and are overwritten after each simulation. [[EM.Cube]] deletes most of the files in the project folder before every simulation. The exceptions are the project and model files. It is very important to remember that the project folder is not a place to save your data. Every time you run a simulation, [[EM.Cube]] prompts that you are about to discard all previous results and asks whether you want to proceed.
You can clean up your project folder at any time through '''Menu → Simulate → Delete All Data Files'''. All Data Files or by right -clicking on the "'''Data Manager" ''' item in the "Observables " section of the Navigation Tree navigation tree and selecting "'''Delete All Data Files"''' from the contextual menu. In order to preserve your simulation data, you have to save them in a different folder other than the project folder. One way is to create a subfolder in your project folder. The contents of subfolders are not deleted at the start of a simulation. To save the data in a project subfolder, select the menu item '''Menu → Simulate → Save Data As...''' or right -click on the "'''Data Manager" ''' item in the "Observables " section of the Navigation Tree navigation tree and select <b>'''Save Data As...</b> ''' from the contextual menu. This opens up the Save Data dialog with the default subfolder name "Simulation Data" in your current project folder. You can choose the default subfolder name and location or change the name or browse to another location on your hard drive.
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