My second thought was that it is the Dropbox sync that caused the violation but apparently not.

Could be too. If the INI file was locked by Dropbox when WinSCP tried to write it.

I missed adding that I tried it in admin mode AND in user mode too, so that couldn't be the culprit.

I had the ini file outside the Programs older, actually in the Dropbox folder. My second thought was that it is the Dropbox sync that caused the violation but apparently not.

Seeing, you run WinSCP in an admin mode, I assume that you actually did not run it in the admin mode, when the error occurred. Then, when you attempted to change site list (any change would do, not only removing site folder), WinSCP tried to save the change to an INI file (you use portable mode). As you probably have the INI file in your "Program Files" folder (not recommended set up), it failed as described in the bug ("Failure when error occurs while working with local files").

Thanks for the reply.

I could not reproduce it with neither the debug nor the beta version, and surprisingly neither with my current version.
So I suppose it is resolved, thanks.

OK, I was not able to reproduce this, because it's fixed already:
https://winscp.net/tracker/1218
I'm sending you a dev version for testing.

Thanks for your report. Though I cannot reproduce this.
I have sent you an email with a debug version of WinSCP to address you have used to register on this forum.

When trying to delete a site folder with items in it I get this error message:



Clicking OK shows the "Invalid access to memory" dialog.

No errors if the folder is empty.

Using WinSCP 5.6.1 beta (latest) portable, default English locale, Windows 7 Hungarian, admin mode.

WinSCP 5.6.1

Error message:
Invalid access to memory.

Stack trace:
[00E9D9C8]
[77287186] ntdll.dll.RtlRaiseStatus
[77287012] ntdll.dll.KiUserExceptionDispatcher
[011FAA50]