No offence, but I'm not really sure if I understood you actually, but I guess you mean either of these 2.
1- If you wanna edit a meta file all what you got to do it right click on it and then "open with" and then choose Notepad OR WordPad.
2- If you mean you tried to upload your map but you got an error that you don't have a meta file in your map follow these steps:
- Open the map as zip.
- Then you will find a folder inside it, open it.
- Now copy all map files and go back to map folder.
- Paste map files that you copied beside the map folder and when you paste them delete the map folder.
- Now try to upload your map again as zip through web upload.
How edit the meta.xml?
Says my map is not meta.xml and is in the folder , I have to edit something in the goal? As it already did this ... Inside the zip explained create a folder named map . It's okay? Help!