Don't worry, normally it's quite easy to upload them to the board again
Here's what you have to do:
1 ) Download the latest launcher (in your case the launcher for the Obsidian v4) and install it with Administrator rights (IMPORTANT).
2 ) Download the Default v4 Sound Font set from here:
http://www.ultrasabers-uploads.com/fonts/Defaultv4.zip3 ) Unzip to a folder of your choice, but try to keep in mind which one you chose
4 ) Turn your saber on.
5 ) Plug it into your PC (USB 2.0 port!).
6 ) Wait until the driver is installed (only when you connect it the very first time).
7 ) Run the launcher with Administrator rights (right-click -> Run as Administrator) (IMPORTANT).
8 ) Switch to the Obsidian sound board tab in the launcher.
9) Open the Sound Wizard.
10 ) Choose a bank.
11 ) Look for the folder you saved the unzipped sound fonts to.
12 ) Insert the appropiate files in the different sections, i.e. tag/boot sounds in the Tag/Boot Sounds section, lockup sounds in the Lockup Sounds section etc.
12 ) Click on "Write Sounds" on the left.
13 ) Save the different fonts on your HDD as a backup so that you don't have to do the whole procedure again. If you ever need to upload them again, you just load the different compilations to the banks, not every single file.
14 ) Click "Write Sounds" at the bottom.
15 ) Wait for the files to be written to the board.
16 ) Close the Sound Wizard.
17 ) Go back to the Main tab in the launcher and click "Disconnect".
18 ) Unplug your saber.
I hope that it's not too detailed, but that would be the right order. Be extra careful with steps 4 ), 5 ) and 6 ) - follow exactly the order, otherwise you may have many connection issues! The same goes for 17 ) and 18 ) - don't unplug before you disconnected the saber!