Rekordbox - Unexpected application Error

0) Have you read the "READ ME FIRST" thread in its entirety AND TRIED THE SOLUTIONS THERE before posting: Yes, I swear it!
1) Operating System: Windows 7
2) OS Type: 64bit
3) rekordbox version: 4.0.5
4) Using LINK: No
5) Source Hard drive / Flash drive / SD card file system: NTFS
8) Is rekordbox crashing at all: Yes
8a) If crashing, is it resulting in: Unexpected application Error
9) Are you able to repeat / reproduce the problem:  Yes
9a) If yes, can you do it consistently: Yes
10) Does the problem occur with one specific song: No
12) Provide as much detail of the issue here:

Just bought an DDJ-RX and installed Rekordbox 4.0.5. Rekordbox crashes on start up and i recieve the unexpected application error. Then it shows me the rekordbox\crashes folder with the dump files.