I have been playing around with tc v2.8 on windows qemu using a wireless internet link. When installing the emelfm file manager extension the wireless link went a little flakey and caused the app browser installation to fail after 2 of the dependencies were downloaded.
So then I repeated the app browser installation of emelfm and it completed OK. However, when I went to the apps audit and did a list of the dependencies many were missing. I figured I should be able to do an update on the dependencies and all the missing ones would be installed. This did not happen so I guess the extension must be removed and then reinstalled.