Hi Rinku, re: 1945.capx
Not sure if you're working with projects as a folder, or as a single capx file, but bcos we're both at learning stage, best to make new projects as folder, just to see how all the xml layouts and event-sheets look as individual files.
However, if you've only got the capx file, open the file in zip/unzip program and copy contents to a new folder. (note: capx is just a renamed zip file)
Open a text editor, and open file '1945.uistate.xml'. Below 'Event sheet 1' add this line;
<event-sheet active="1">Event sheet 2</event-sheet>
Now go to 'Event sheets' folder. Open 'Event sheet 2.xml' in your text editor. On line 16, where it says '>Layout 1<' change it to '>game<'. Save file. Right, now it should load ok again.