Pascal P you are absolutely correct. "M'" is the direct object pronoun for the verb 'aider'.
Andrew, try thinking about it in terms of English. We also wouldn't conjugate 'help' when making this kind of sentence.
In English, it's easiest to talk about using 'he', so let's switch to using the third person: 'Can he help me?'
If you were to conjugate 'help' to the third person singular in English, it would be 'helps', but as you see in this question, it doesn't have that 's' and stays in the infinitive no matter who the direct object is - just like in the French!
I hope this helps explain. If you're still having trouble, try emailing our tech support team at firstname.lastname@example.org - they may be able to help further.