Upgrading Subsonic on Ubuntu server - need advice

Hi,
I am a happy subsonic user for the past few months. It is running smoothly from a remote Ubuntu server. I followed an install tutorial similar to this.
Now I wish to upgrade to 4.9 but I'm somewhat nervous as this is my first time. So before I screw anything up I thought I should ask:
Are there any particular issues I should watch for, or can I just install the new version over the old without disturbing my existing settings?
Any advice or pointers would be highly appreciated
Many kind thanks in advance

I am a happy subsonic user for the past few months. It is running smoothly from a remote Ubuntu server. I followed an install tutorial similar to this.
Now I wish to upgrade to 4.9 but I'm somewhat nervous as this is my first time. So before I screw anything up I thought I should ask:
Are there any particular issues I should watch for, or can I just install the new version over the old without disturbing my existing settings?
Any advice or pointers would be highly appreciated
Many kind thanks in advance
