"Upload Files" button doesn´t appear.
Go to Dashboard -> System and Settings -> Permissions & Access-> Allowed File Types... and check to see if you have any file types listed. If not; add the following file types-
flv, jpg, gif, jpeg, ico, docx, xla, png, psd, swf, doc, txt, xls, xlsx, csv, pdf, tiff, rtf, m4a, mov, wmv, mpeg, mpg, wav, avi, m4v, mp4, mp3, qt, ppt, pptx, kml, xml
Now go back to file manager and you should find that the 'Upload' and 'Upload Multiple' options are now available.
The thanks should really go to Matt Waters (http://www.concrete5.org/profile/-/view/40648/... ). Couldn't have done it without his help!
Here's an excerpt from his explanation-
This is not caused by one-click installer services as previously suspected. We've figured out that the culprit is likely the HTML5 Music and / or HTML5 Video add-ons from the Marketplace. These add-ons inadvertently wiped out the missing Allowed File Types values upon installation. The add-on developer has been notified and asked to fix this bug."