The images are working fine for me.
As to your problem: without much information to go on, it's difficult to say what the cause might be.
I would suggest that you check MC is outputting to your DAC via WASAPI, and that you have the "Maximize device volume during playback" option enabled in the device settings.
Setting the volume mode to disabled should lock it to 100%, but maybe set it to "internal volume" at 100% instead, and check that Volume Protection is disabled.
If that doesn't fix it, post an image of the Audio Path when something is playing. (the far-right icon in the upper-right section of the player should display it)
It sounds like this is a new problem, but I would also mention that your Benchmark DAC2 ships with 10dB of passive attenuation on the headphone outputs by default, and can be configured to 20dB or 0dB if you need the output to be louder or quieter.