strange issue

[webvent]

Hi

I am trying to use admin for the first time to replace the logo and something really strange is happening.
I replace the logo for a completely different one but in admin/filemanager, shows a thumbnail of the previous logo
To make sure, I deleted the previous logo file. But still shows it.
I have absolutely no idea how this is possible.
Any idea?

[DIGI3]

File Manager may not be generating a new thumbnail. I think this was improved in recent versions but you forgot to include your version info etc. Regardless, you can delete the thumbnail manually in your filesystem or try generating a new one.