Your D logical drive is already within an Extended partition.
The idea is to get the E partition inside the Extended partition as well.
You can use either the PM 9.5 PRO, or the Hard Disk Manager 9.5 ( the boot disc from both also has that function and will work for any bit version.
It is very straightforward - just rt click E , select Make Partition Logical. Click Yes :
I tried it myself - took only a few seconds and worked flawlessly without any data loss.
Never a bad idea to back up anything vital before any kind of operation ( you probably have done that already).