Scilab 6.1.0

Released on Tue, 25 Feb 2020
System requirements | Change log
Scilab 6.1.0 is released under the terms of the GNU General Public License (GPL) v2.0. Prior to version 6.0.0, Scilab was licensed under the terms of the CeCILL license v2.1, and continues to be available under such terms.
 

Windows Vista, 7, 8, 10

Scilab 6.1.0 - Windows 64 bits (exe)
Scilab 6.1.0 - Windows 32 bits (exe)

Good chances are, you have a 64 bits machine! 
But the 32 bits version will work in any cases.

GNU/Linux

Scilab 6.1.0 - Linux 64 bits, (scilab-6.1.0.bin.linux-x86_64.tar.gz - 241M) (gz)
Scilab 6.1.0 - Linux 32 bits, (scilab-6.1.0.bin.linux-i686.tar.gz - 244M) (gz)