USB Hard Drive safely remove

Hi everybody,
I need Your help!
Yesterday I updated the software to the last version 1.5.2. My media files are on a USB external hard drive. I choose the directory of my exernal drive on the console and all works.
But when I want to safely remove the hard drive, windows say me that another application is using the hard drive. So I have to shutdown Serviio to allow the safely remove.
With the previous version installed (I thind 1.3 or 1.4) I was able to safely remove the hard drive without problem and without turn off Serviio.
What can I do to do this with the new version of software?
Thanks a lot!
I need Your help!
Yesterday I updated the software to the last version 1.5.2. My media files are on a USB external hard drive. I choose the directory of my exernal drive on the console and all works.
But when I want to safely remove the hard drive, windows say me that another application is using the hard drive. So I have to shutdown Serviio to allow the safely remove.
With the previous version installed (I thind 1.3 or 1.4) I was able to safely remove the hard drive without problem and without turn off Serviio.
What can I do to do this with the new version of software?
Thanks a lot!