Your page :
https://www.akeebabackup.com/download/akeeba-extract-wizard/akeeba-extract-wizard-3-5.html
is not updated for the last version of Akeeba eXtract Wizard.
Like the issue #27972 impossible to extract JSP (crypt file) :
https://www.akeebabackup.com/support/site-restoration/Ticket/27972-extract-wizard-invalid-archive-format-with-jps.html
You informe in the support of #27972 to use the 4.x version but no link to download it.
I found it :
https://github.com/akeeba/nativexplatform/releases/
Thanks to update your main download area (like said in the support of #27972).
Even, thanks for your good tools :)