Crashplan for Dummies, aka Step by Step :)

I noticed that if you don't want to keep opening putty every time you want to connect to your NAS you can do the following.
I make no guarantee that this will work but it has worked for me on my NAS PRO 6 and if you don't know what you are doing don't do it.

Step 1:
I recommend you make a copy ui.properties of the file before editing them. It should be in C:\Program Files\CrashPlan\conf\
On the PC you are using the crashplan GUI Edit the ui.properties file: Change serviceHost=NAS.IP.ADDRESS and rem out everything else

Step 2:
Stop crashplan by SSH into your NAS and type in

cd /usr/local/crashplan/bin

then type in

./CrashPlanEngine stop

Step 3:
I recommend that you make a copy of the file my.service.xml. SSH into your nas and change to the directory

cd /usr/local/crashplan/conf

and type

cp my.service.xml my.service.xml.bak

On the Nas unit you can either use Win CP (it has a built in editor and a windows gui) or Putty to ssh into your machine and use vi.
Edit my.service.xml located in /usr/local/crashplan/conf. Change <serviceHost>127.0.0.1</serviceHost> to <serviceHost>Your.NAS.IP.ADDRESS</serviceHost>.

Step 4:
Start crashplan by either rebooting or by SSH into your NAS and type in

cd /usr/local/crashplan/bin

then type in

./CrashPlanEngine start

There now if everything was done right when you click on Crashplan on your PC you will no longer need to open putty and establish a tunnel.