UBB.threads PHP Forum Software Community Forums UBB.threads Version 7/8 Support Attachments not working since upgrade to 7.5

We just upgraded to the latest release and now our attachments are not working. If I try and post a message and include an attachment, when I go to File Manager, it allows me to choose the file. When I click "Done Adding Files", it takes me back to the post but shows the file count of 0.

So, I went to the feature settings and clicked the attachments tab. The storage directory is:

c:\inetpub\wwwroot\ubbthreads\uploads

If I test the directory, it works fine and tells me the directory exists and is writeable.

When I click "update feature settings", it saves the path but it strips out the slashes, leaving:

C:Inetpubwwwrootubbthreadsuploads

Any ideas on why it's behaving this way and what is needed to fix this?

Thanks