Import attached files from Mantis to Youtrack

I spent the last few hours migrating mantis to my new youtrack system. To do that I used the python

script, offered from JetBrains, called Mantis2Youtrack.

After this was done, I recognized, that it worked perfectly. The only problem is, that the attached files

in Mantis didn't get imported to YouTrack, so I would have to change every Issue manually. (About 10.000 Issues)

Is there any way to import all attache files from mantis to youtrack?