Ah, that explains it.
Okay - look at that screenshot showing the files in the folders. In the first one, it says it's a VX Ace data file, and the icon is correct. But when you look at the second screenshot, with the 82 files, that icon is different - it looks like it's lost its extension somehow. Can you change the folder view to Details and set it to show file extensions?
Also, already mentioned ... if you're going to call it Map082, then you need to have 82 maps in your project. If you only have 2 maps and you want this to be the second map, close the editor, delete Map002, and rename Map082 to Map002. Make sure it has an extension of .rvdata2. Then open the project back up again and it should be there.
Note if it uses a tileset you do not have, or even if it uses different tileset slots in the Tileset tab, it will not look right when you open it up.