1.102 is the internal version. It's the correct one for the latest TP install.
No I'm not telling you to edit the files that I attached.
RC1 is the latest version of TP, there's no need to do anything else. If you still have the same error, it is because your file is not updating or not getting overwritten when you upload it. authorID only works in SMF1.x. As you can see if you compare the lines that your error is on in both the SMF1 and SMF2 install, you can see they are totally different.
SMF1
$request = tp_query("SELECT dlm.id, dlm.name, dlm.category, dlm.file, dlm.downloads, dlm.views, dlm.authorID, dlm.created, dlm.screenshot, dlm.filesize,
SMF2
$request = tp_query("SELECT dlm.id, dlm.name, dlm.category, dlm.file, dlm.downloads, dlm.views, dlm.author_id as authorID, dlm.created, dlm.screenshot, dlm.filesize,
See the differences between the authorID parts? You need to upload the files again and then verify that those files have all been overwritten.