(Ow, I just understood what the last part of the readme meant... I feel stup'...)
I typed the following in my commandline, didn't work. I'm aware I surely made a mistake, but I can't figure where.
d:\bureau\dlgconv_05\dlgconv -i "D:\Bureau\dlgconv_05\test\*.uti -t 3
... Where \test is the folder where my .uti are located.
<edit />Never mind. At all. Got it. I feel awfully newb once again...
<span class="lyric">There were all these files on the screen, appearing one after one, and each one had an "OK" mark, and, ow, that was... Beautiful...</span>
Anyway, er, I guess this thread is to be closed. Tk102's tool appears to be perfectly able to translate several files at once...