Help calibre is seen as an unidentified app in High Sierra
I am not being allow to download Kindle books as side loads so I can place it in my calibre library on MacOS High Sierra. I admit to being new at MacOS. I was not having any issue with Sierra but since upgrading I can not get my books to download and be placed into my calibre library. The books are showing as text files and when I tell it to use calibre instead I get that calibre is not a recognized app from a recognized developer.
Please someone give me some pointers here.
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