Common to both analyses is that they point to a bitcoin wallet. Besides this, it looks like DxO has changed providers for license activation. Previously it was hosted at https://hostedactivation.com, but I see they have switched to https://licensespring.com.
I hope they provide the option for us to activate and deactivate our license within the program, like in DaVinci Resolve, maybe in version 8.
I don’t have access to my threat hunting suites I once did in my previous employment but my guess is that this is a collision more than a threat signature.
The string ‘3euvAgMBAAGjQjBAMA8GA1UdEwEB’, which looks like a bitcoin address, is just a part of one of embedded in dll Amazon’s certificates. Nothing to worry.