Winscp freezes regularly

Once or twice a day (everyday), I switch to the running Winscp window and it is completely blank, frozen, nonresponsive.

I have to click the 'red X' and click OK on the dialog that pops up asking me to end the program that is not responding.

Other than that I can't report much of anything other than when I last checked the window it was fine and I had just uploaded one or more files without any problem.

This just started, I am pretty sure, after the latest update 4.3.3. Build 1340 was installed via an update from the previous version.

Is there something I can enable or look for to give some kind of indication what happened? I realize this is nothing to go on by just saying it was unresponsive.

I did turn on the logging option which I just discovered. So I will see what that says.

I'm experiencing also random freezes. I can't discover what is the exact cause, so I can't reproduce. I start an upload session, queue a lot of files and let winscp work in the background. Lately when I switch back, it's non-responsive.
It's interesting, in the majority of the cases, winscp is still working in the background (uploading) so I let it work. Since I'm in trouble when I stop the upload (half files are still taken and processed by the stock agency) I wait until all the downloads are finished. To know this, I check the network activity in the win. task manager, after this End task for winscp.
The problem my rise if I minimize winscp before let it work in background.
As soon as I will know more about freezing I will post here.

Can you send me an email, so I can send you back a debug version of WinSCP to track the problem? Please include link back to this topic in your email. Also note in this topic that you have sent the email. Thanks.