I have tried your upload-manager but I have experienced some problems with parameters reading (it didn’t catch the paramaters like ‘delete_all’, ‘confirm’ etc). I’m not a php coder but I’ve made some changes to solve this problem (I’ve just used ‘$_GET’ method to read parameters) and I’ve also added a link to the listed files in the visualisation. I don’t know if it can be useful but you can find the my modified versionhere.
P.S. My server is based on Ubuntu Linux.