How to setup erase of multiple marked files sequentially (NOT in parallel)?

[tobwz]

I marked multiple (e.g. 20) files in a directory, then I right click and selected "Secure delete" from context menu.

Now SDelete GUI opens 20 (!) command prompt windows and tries to erase these 20 files in parallel. That freezes almost my hard disk transfer and my system.

How can I tell SDelete GUI to erase all marked files sequentially one of the other and NOT in parallel?

Can this be added in next release?