Hi again Martin,
I'm not sure what's going on with my mail client. It seems I have an email stuck in drafts since Friday afternoon that never made it to you because every time I hit "Send", Yahoo fails to send it. This is the email's body:
Good news! I think the problem is gone lol
So after my last email to you I remembered something else that happened recently (within the last few months) that could have been responsible for this bug... I had 2 thoughts:
1) I remembered that in the last few months, there has been 1 other thing that could also be responsible for this bug besides a WinSCP update and that is a Windows Update.
2) It felt a bit off that all drag and drop scenarios work except the one from Windows Explorer's window... I thought that could easily mean Windows is involved in this bug.
So I decided to run any currently queued up Windows Updates (I usually only let Windows update whenever it gives me no choice lol), you could say there's usually tops about 2 months of updates. So the machine restarted, I ran Windows Update a second time to confirm that all updates were accounted for, then ran the drag and drop test in WinSCP's portable version and there was no bug! I then ran it in my regular WinSCP and there was also no bug anymore! HURRAY!
That being said, I'm unsure what the culprit was after all. I guess even the simple restart could have been the solution after all (since I usually put my Windows to sleep every night instead of shutting it down). *crossed-fingers* it won't come back after I put it to sleep tonight (I will test for the bug again tomorrow to be sure).
Thank you for putting up with me through all of the back and forth emails. I'm glad to be rid of this problem!
Thanks
PS: I can also gladly report that the problem did not recur after putting the PC to sleep and trying again!