Seems this is only a demo version, because I only have access to three things, jiggle isn't one of them.
Are you using the download from here: http://www.geocities.com/why2kspace/
That one has the jiggle filter enabled.
I clicked on your link out of curiosity and got:
Sorry, Service Temporarily Unavailable.
The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.
Additionally, a 503 Service Temporarily Unavailable error was encountered while trying to use an ErrorDocument to handle the request.
My finished maps
"...sometimes the most efficient way to make something look drawn by hand is to simply draw it by hand..."
Hmmm...I tried a bit ago (~90 minutes previous to this post) and it worked just fine.
My Finished Maps | My Challenge Maps | Ghoraja Juun, my largely stagnated campaign setting.
Unless otherwise stated by me in the post, all work is licensed under a Creative Commons Attribution-Noncommercial 3.0 United States License.
That's odd, then I can't really help. I downloaded it to check it (a while back) and all the EyeCandy filters worked fine and without crippling.
As an alternative to the jiggle filter, try the ripple filter followed by the ocean ripple filter - the results are similar to jiggle and the filters are native to photoshop.