Can't get stuff to delete

You've heard it before from more than one but I've tried the solutions you have offered on your troubleshooting page and I'm still  unable to get rid of old files. I'm currently at 87/100 MB and I would venture that there is likely 20 MB in files I have attempted to delete that will not do so. Furthermore, the default files provided in the jukebox *did* delete which is something I did not want to happen. I am using Google Chrome Version 48.0.2564.116 My operating system on one computer is Windows 7 on the other is Windows 8.1 (they are networked) I'm not sure if Javascript is enabled but I think it is. Anti-virus software is Windows Defender/Malwarebytes Ad Block is the only extension  I use I have tried turning the extension on and off, I have tried emptying my browser cache (both of them), all the things you recommend, I have tried. Please help.

Hi, Stephen J H. At this time, Your Library has difficulty performing operations on more than ~30 items simultaneously. It should, however, be capable of performing as expected with a few items at a time. We're sorry for the inconvenience. Please let us know if the issues you are experiencing involve batch-deleting a smaller number of assets at one time. If that is the case, we'll look more into troubleshooting. Also, please note that the Roll20 Dev Team is working to improve the Art Library as we speak : Steve K. said: Art library management is something that's important to the Roll20 Dev team. It's something we consider a priority, however the API infrastructure has to come first, which will be the focus of our next update. I'm hoping the marketplace and art library management comes shortly after that.

OK, I'll try a lesser number. Can anything be done about the deleted Jukebox files? Also, very very good service response time :)