Can't load file manager; not all files (large batch) uploaded

Hi, I recently upgraded my account to a Professional subscription to take advantage of the increased storage space for hosting all of my bib file's 600+ references with PDFs. I dragged and dropped the files last night into the BibBase file manager and expected them to take a while to upload, but no dice. It went pretty fast for, in a rough count, about 150 files, and still showing more items waiting to be uploaded below, before it stopped completely. I left it overnight with no luck. I now cannot access my file manager, it never loads -- the site has been pretty slow in general since and will often hang, but I can get everything else to load, even my file manager (with about 10 files, mostly .bibs) on my other (personal, non-work) account. I have tried loading my account's file manager from a different browser and different computer with the same results.

My account's username is GCWealthProject, if that is helpful.

I was already not looking forward to potentially deleting 150+ files manually and trying to batch upload again (since it seems duplicate files are not stopped at all, and there is no way to 'delete all' or to create a folder in the file manager that I could have loaded the PDFs into and then deleted if wanted), perhaps by this time selecting files directly instead of dragging and dropping them if that would help at all -- but now I am just concerned that I won't be able to access my file manager at all, along with wondering whether I should have done something different in regards to uploading 600+ files at once. Can you offer any advice or help?

Thank you for all your work!

Adam