Just double click on the Deb package. You must not use caps in the letter R.

You don't say what the file format is except that there are some files with the
deb and rpms in the folder.

If it is a deb, you can install it by opening it in gdebi which is a graphical
tool for installing debs. If it is an rpm then it must be converted to deb
format using a CLI tool called alien which must be installed separately. If you
are using the terminal you can get help by typing the command followed by -h or
--help such as dpkg -h.

If it is compressed, then extract it and see the readme file. If it is a binary
it can sometimes be installed, but you will need to read the documentation in
the folder that was decompressed. If it must be compiled then you will need to
follow the instructions which should work provided you have installed the file
necessary for compiling.