Your page :
is not updated for the last version of Akeeba eXtract Wizard.
Like the issue #27972 impossible to extract JSP (crypt file) :
You informe in the support of #27972 to use the 4.x version but no link to download it.
I found it :
Thanks to update your main download area (like said in the support of #27972).
Even, thanks for your good tools :)