I hit a menu item wrongly. So, ShareX uploaded a screenshot anonymously.
Deleting itself in time is impossible. Why does it upload anonymously at first without warning?
It should warn : which site it uploads to, whether it's to be done anonymously or not
Also, especially it should provide "delete" linke on imgur when uploading anonymously. If it's not anonymous, users can login to their account and delete whatever images they uploaded. But anonymous upload is not possible to delete and it takes time if you file to remove the image to imgur.
ShareX in first screen capture will show warning are you want to upload. And when you press No in this warning it will just disable uploading.
Also deleting it is not impossible because from main window or history you can open deletion URL of uploaded imgur image.
So everything you write is wrong.
I've had this happen to me when I did a fresh install and forgot that I didn't authenticate. You can request imgur take it down at their removal request forum
I requested removal last week but it's not deleted yet.
Whether the warning is there or not, also it will be good to let users know to which service it's going to upload especially if it's anonymous..
You can't do user upload without actually fill your account info, so obviously it was anonymous and it have "Deletion URL" in right click menu and in history. So you could instantly remove it.
@Jaex Great! I found such functionality in 'history' view. Actually I looked up people comment on this functionality and sounded like that there was no way to delete with ShareX.
Anyway, right after capturing an image. it shows a view on which it displays the image file name. On its contextual menu, there is no such menu item like "Deletion URL", although there is one like "Delete file locally" and others. (shown below)

So, it's kind of hard or un-intuitive to guess that there will be deletion functionality in 'history' view.
It is in Open sub menu. There is nothing hard to know this.
@Jaex Probably your intuition is different from mine. "Open" should sounds like opening a file for viewing, editing, and so on. Well.. for "Open Deletion URL", it kind makes sense once you see it and think about it, but please think about it freshly. Open an image to delete it? It sounds weird.
Well, it's about opening a URL, which is for deleting the image on imgur. So, in that, it makes sense, but isn't "deleting a image with address, URL" more intuitive?
First time user here... Obvioulsy don't know all tricks so I had to google to this page to resolve accidently "uploading" my bank statement... UX for this is terrible. Why is anonymous public upload button even there? What made you come to this strange decision? And I had to dig through a bunch of convoluted menu options to figure out how to delete it. This software is not good for anything sensitive.
The author doesn't seem like they'll budge, but this is not a smart decision luckily i made this mistake with a silly snapshot
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@Jaex Probably your intuition is different from mine. "Open" should sounds like opening a file for viewing, editing, and so on. Well.. for "Open Deletion URL", it kind makes sense once you see it and think about it, but please think about it freshly. Open an image to delete it? It sounds weird.
Well, it's about opening a URL, which is for deleting the image on imgur. So, in that, it makes sense, but isn't "deleting a image with address, URL" more intuitive?