Hello Theas,
The conflict is with the application folder.
Before installing there, you should check no old versions are there, AND also delete Hansaworld folder (com.hansaworld.stacc.xxxx.xx )from containers if there is such.
To see containers you can follow this guide or google on " how to find containers in mac"
With either the desktop or a Finder window as the frontmost application, hold down the option key and select the Go menu.
The Library folder will be listed as one of the items in the Go menu.
Select Library and a Finder window will open showing the contents of the Library folder.
If you close the Library folder's Finder window, the folder will once again be hidden from view.
Best regards,
Hansaworld support