@tomossorry... no joy
Can you drop the files from this ZIP (attached) in to your AM folder (overwrite the files that are already there) and tell me if this worked
Spoiler (click to show/hide)
Problem signature:
Problem Event Name: CLR20r3
Problem Signature 01: AudioMarker.exe
Problem Signature 02: 1.0.0.0
Problem Signature 03: 5bda04f3
Problem Signature 04: AudioMarker
Problem Signature 05: 1.0.0.0
Problem Signature 06: 5bda04f3
Problem Signature 07: 1b
Problem Signature 08: 1
Problem Signature 09: System.IO.FileNotFoundException
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 6153
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789
Read our privacy statement online:
http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409
If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt
Problem Event Name: CLR20r3
Problem Signature 01: AudioMarker.exe
Problem Signature 02: 1.0.0.0
Problem Signature 03: 5bda04f3
Problem Signature 04: AudioMarker
Problem Signature 05: 1.0.0.0
Problem Signature 06: 5bda04f3
Problem Signature 07: 1b
Problem Signature 08: 1
Problem Signature 09: System.IO.FileNotFoundException
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 6153
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789
Read our privacy statement online:
http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409
If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt















So the error message was right! 
Hope you're enjoying using it though 