When you are creating large amount of menus (hundred and more), the memory may get soon full and the Windows system may start showing memory messages.
One way to save memory at this point would be to use menu Project - Free-up memory to dump not currently used data from memory.
The other, better way is to plan ahead and create Mega-Project, that will cache all menu data constantly to disc and not to memory.
From the Default Project window that appears when you press New, choose Mega-Project option.
Note: If the Default Project window doesn't appear on New, then you may have disable it - go to menu Project - Set Default Project and then set ON the Show every time New Project is created option.
The next step in the Mega-Project is to select the Project folder where all data will be constantly saved.
The data are saved to the disc when you close a Menu and then loaded when you open the menu back. The folder will have a file for each menu and/or cell on your project.Each of the files can have one or more megabytes depending on the data, so make sure your disc has enough space to store all your menus (could be few hundreds of MB in total)
The status bar will remind you that you are in mega-Project mode and also will indicate when there is saving or loading of the data:
There is no way to turn Regular project into Mega-project and vice-versa, so a careful planning is necessary before you start project.