Flexinode 4.5 upgrade problems

I tried to upgrade my 4.4 flexinode module into 4.5. Though it's working quite good, there seems a problem with old flexinode data of type file.

I noticed this mapping of serialized fields (object vars):

Old || New
===========
name -> filename
path -> filepath
size -> filesize

So when the module tries (using $file object on flexinode_field_file_format hook) to pick up uploaded files, it fails coz the fields is different from what the new object has.

I tried using the update script provided with flexinode 4.5 and it does no help.