This is what I found in an extinsive search on line:
Quote:
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File extension RRA description:Some of files such as DLLs and EXEs, which may be in use ("locked")at install time, or during an update. When a file is locked but the installer wants to overwrite it, the new file is written to a semi-random name with a .RRA extension, and Windows is notified to rename the .RRA named file on next reboot to where it should have been installed.
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Did you have the current Hoster open while trying to upgrade it? Try restarting the computer to get it to complete the install.