its good to have a backup installer for that, if you can find one.
not sure if there are any valid links elsewhere in the forum, but I expect google can find you one.
i have one in dropbox so PM me if you get desperate
this version KindleForPC-installer-1.17.44183.exe, same as what you already have.
there ought to be a way of converting an installed PC program back into an installer. it's easy on android, never tried to do it in windows
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