Download the HFS Hub installer from the link below.
HFS Hub for Windows
When downloaded run the installer to install the HFS Hub. You will see the HFS Hub Setup Wizard
When you click Next you will see the following screen
Select the default option, Install for all users of this machine, unless you don't have admin rights or the password for an admin account on this computer. Only in those circumstances should you select Install just for you.
When you click Next installation will start. When it completes click Finish. The HFS Hub should then start (unless you clear the Launch HFS Hub checkbox). If it doesn't you can start it from the Start Menu.
Download the HFS Hub package from the link below.
HFS Hub for Mac
When downloaded run the installer to install the HFS Hub. You will see the installer welcome screen
Click Continue to take you to the Installation Type screen.
Here you should click the Install button unless you don't have admin rights or the password for an admin account on this computer. Only in those circumstances should you select Change Install Location... and at the next screen
select Install for me only then Continue. You will be returned to the Installation type screen where you can press Install.
Unless you are installing for you only you will be prompted for your password or a password of an administrator account.
Once installation completes you can start the HFS Hub from the Launchpad or Finder in the usual way.
Only use this method if you do not have root/sudo access on your computer and you want to be able to install and run CrashPlan without root privileges.
Download the HFS Hub package from the appropriate link below.
HFS Hub tar file installation
When downloaded expand the tar file.
tar xzf ox-hfs-hub.tgz
This will create a directory, e.g. hfshub-install-1.4. Change to that directory and run the install script, e.g.