I've checked this issue, and here are the steps you should complete to enable the "Upload a File" button for the New Topic Form on the front page:
1) Make sure that in
bb_plugins.php, the code for the File Bank is inserted
after the code of the New Configurable Topic Form.
2) Change the default code in
bb_plugins.php from this:
if($action=='vtopic' or $action=='vthread' or $action=='editmsg'){
to this:
if($action=='vtopic' or $action=='vthread' or $action=='editmsg' or ($action=='' and $page==PAGE1_OFFSET+1 and $firstPageTopicForm==1)){
3)
This should work — tested locally. Please test on your side and let me know if it helped.
I'll add a note on it in File Bank's README.
