Okay, sounds like a bigger problem...I'll try to summarize what I've understood from your post:
1. You connected your saber to the v4 Launcher (because you have a v4 Obsidian sound board).
2. You made changes to the default sound fonts in a case that they don't show up in the launcher anymore (normally it should show you all banks with the appropiate sound fonts).
First thing I'd like to know: where do you see that "load from board" option for sound fonts? I only see that for the sensor settings...
Second thing: my solution attempt
a) It sounds like the banks have emptied somehow - either because you deleted the banks or you accidently used the "Format Memory" option.
b) If you still have the paper explaining the v4 feature regarding changing sound fonts without the launcher, look at the names of the sound fonts and then try to download them from the US homepage again.
c) When you did that, create the appropiate number of banks for each sound font package.
d) Now, put the different files (boot, power on etc.) into their respective category (Tag/Boot, Power On etc.).
e) Go to the option "Write Sounds" at the end of the list in the left box.
f) Then, click "Write sounds" at the bottom of the launcher (it's between "Previous" and "Cancel"). This should give you back the default fonts of the saber.
Remember: every time you edit sound files, you always need to click the final "Write sounds" at the bottom! It's not enough to put them into the banks and then disconnect the saber or simply click "Write sounds" in the left box, this does NOT update the sound board!
If you have pics (or if you can take some) of the launcher and its content when the saber is connected, post them! That could help a lot to solve the problem