This entry looks a little stale but I am experiencing the same issue. I didn't notice a problem until I loaded version 1.31.325 but to be honest I am not sure I tried secure delete before that. It appears to be related to the secure delete functions only. If I enable either level of the secure delete the prgram crawls and my network activity lights go beserk, which in itself is interesting. If I simply click on the header bar to reveal the windows program context menu (restore, move, resize, etc.) the network activity stops and the programs speeds up to normal. Click away to close that menu and the slow behavior starts again. If I just do the normal (non-secure) delete the problem never happens.
My guess, and that is all it is, is a thread management problem in the program logic for the secure delete functions. Why the network is being accessed I can't say.
Whatever the case, this seems to be unintended behavior.
