Heteropteryx Dilatata falling apart?

Hello Everyone,

I have a problem with my (first and only) Heteropteryx Dilatata Female. She just turned sub adult, and I'm worried that she won't make it. 

The problem seems to be kind of a sickness. Some weird blue spots accured - today is the third day and it looks like the exoskeleton just disappears. It got worse and I hope one of you has experience with it or knows, what is happening.

I am also worried that the male I'm keeping her with gets sick too. Is there anything I can do or should I just end her suffer?

I attached a picture with the detailed process.

Thank you in advance.

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