Little Flocker Xfense installation

OS3

Hello everyone, 

 

I was reinstalling my Mac and wanted to install Little Flocker now F-Secure. 

after I use the old installation packets LittleFlocker-1.6.2 and enter my registered file 

I wanted to update the software to the newer version/F-secure found the update, installed it but than later I've got a error contact manufacturer 

 

 Also I'm running MacOS high Sierra 10.13.6 

 

Is it still possible to run the software?