theme not upgrading properly

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I installed C5 with hostmonster. I purchased the sue theme and installed it: version 1.0.2. Later a new update was put online and I got a message prompting me to update. I clicked on the button in the window informing me that I was updating frome 1.0.2 to 1.0.3 but that version never gets installed (as per the theme's version number in my C5 install) and I keep getting a prompt to upgrade.

Is there any known issue for upgrading themes? Cache or tmp files to delete? Any help would be appreciated...