[WD21] Windev makes project directory invisible!?!?!

Hi all,

Has anybody else experienced this:

Sometimes (not very often, luckily), Windev makes a project directory (or its sub-directory) invisible!

This seems to happen especially when opening a new project directory that Windev has not been in touch with earlier. This happened today:

I first did a clean install of the latest A360ERP to see whether is has something interesting.

Then I tried to open it by doubleclicking its WDP file in Total Commander file manager.
It tried to open with WD19, so I closed the WD19 opening window, because I know this app is in WD21 format. Why did it want to open in WD19?

Then I dragged the WDP file on top of the WD21 icon on the desktop. It opened normally, but at the same time the app's directory became invisible. And stayed that way when I closed WD21. Or maybe the directory became invisible when it was touched by WD19, I am not sure.

Earlier there have also been cases when my own many years old ERP's development directory, or some of its subdirectories, have become invisible.

I have a batch file that checks the whole partition and removes the invisible flags, but this takes "ages" (some 15 minutes or so) when it goes throug all the directories on the partition, like this:

attrib -h -r -s *.* /s /d

I don't like to play more with this problem, because it takes so much time to recover from invisibility, so I'm asking whether anybody has some more exact info about it.

Maybe it is caused by WD19? Maybe I should remove the WD19 installation?

Best regards
Ola