help! matrix in jit.uldl won't clear, is this a 10.5 bug or am i doing something wrong?

(can someone please delete the previous duplicate post for me it had half the text missing cheers mathew)

hello,
i'm using jit.uldl,
i have the latest max msp, jitter and incremental build of jit.uldl
i'm using jit.uldl to download a textfile as a matrix, by passing a message to jit.uldl like
download ftp://myserver.com/list.txt matrix

and it work just fine

but each time it downloads it appends to the end of the matrix held by jit.uldl

so although the first time i get:
one two three four

after a couple more refreshes i have this in the matrix:
one two three fourone two three fourone two three four

i'd like to be able to clear the matrix before i do a download.
but i can work out how to clear it
sending a 'clear' message doesn't seem to do anything.
does anyone understand whats going on?
cheers
thanks for the help