Maybe the power tools can help you because I don’t know if exist one application that can be modify a meta file, in this power tools has the SharedFileViewer and the manual says:
META FILE READER
This application can also read .meta files, to show data in them. All objects will be marked red
(corrupt), this is expected. It will always only show one object node. Here you can find, amongst
other data, authorization tables for Qlikview Server DMS security mode and Autoload/Preload flags.
NOTE: This functionality is read-only with .meta files. None of the below functionality applies
This is the only tool that you can use for check if the file is corrupt.
Here is the URL for download