TinyUmbrella seems to want Java in order to run. Since I don't want Java on my system does anybody know of an alternative program used to grab SHSH blobs that doesn't require the use of Java?
You can use redsn0w to save your blobs as well, although you do have to download the full IPSW file for the version of IOS you are saving blobs for, which can be a little bit of a pain. However, that said, it's perfectly good and reliable.
In redsn0w, go to Extras > SHSH Blobs > New, and follow the instructions.