It's not clear whether you think the file is damaged because
F1 does not work or the two things are separate statements.You say
that when you TRY to install you get an error so it sounds like you
cannot install but you then refer to uninstalling. What error
message?
The help for the Packager is accessed by clicking "?" on the
title bar.
There are some links in the Packager article on my site. See
if they help.
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