Thank you for getting in touch with us. Unfortunately I am unable to reproduce the error you've encountered. Will you be able to send us the original dll you are struggling with, so we can further investigate what might be causing the issue? Thank you in advance.

I am not sure what exactly are you talking about. Can you provide more details about what "deep sea evaluation version" refers to. Is it a trial of some program? If so, can you give a link to the program's page, or some additional info. 

Thanks for writing back and clarifying the matter. Unfortunately I can't help you, as we are not supporting or developing de4dot. In fact, our plugin still uses de4dot version 1.9.1 and from your screenshot I see you try out version 2.0.3. I suggest you get in touch with the folks creating de4dot via the email or the site they have provided in the error report. I'm sure they'll have the knowledge needed to answer your questions.
Regarding the existence of another deobfuscator - we do not have another deobfuscating plug-in. There are probably another deobfuscating tools out there, but as far as I know, de4dot fits our needs best.