Installation on a Mac laptop

Dear IKST friends,

I'm interested in Cinemas and I downloaded the package for OSX and tried to install it but the operation fails immediately as unzipping fails:

simonem@oak Downloads % unzip Cinemas-mac-offline_v4.0.13_06_Nov_2020.zip
Archive:  Cinemas-mac-offline_v4.0.13_06_Nov_2020.zip
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
unzip:  cannot find zipfile directory in one of Cinemas-mac-offline_v4.0.13_06_Nov_2020.zip or
        Cinemas-mac-offline_v4.0.13_06_Nov_2020.zip.zip, and cannot find Cinemas-mac-offline_v4.0.13_06_Nov_2020.zip.ZIP, period.

I tried to unzip the archive on other non-use machines as well (e.g. on a lnx-pwr9 machine) but the outcome is always the same. 

Can you help me?

Best regards,

S.