Hi Wyatt, thanks for reaching out!
We originally released the [Nero Engine] for C3 due to there being a little 'more' that C3 allowed us to do. This involved parsing down and rewriting a LOT of what we were trying to do to get it into C2 at all - honestly the only reason we did a C2 build was that at the time Scirra required any Game Templates to include a C2 version.
*Keep in mind that Construct2 is now considered by Scirra to be at end-of-life - there will not be any more updates/support as of July 1st.
*We would personally, HIGHLY recommend Construct3 - the updates they're offering are night and day compared to C2, and it is ultimately worth it - don't let the 'yearly subscription' model throw you off, it's very worth what amounts to $8 per month (and you can cancel if you don't want to continue - there is NO pressure to continue, and we have even seen them refund charges if you're not happy).
*Some C2 license holders were granted a free 1st year of C3, linked to your original purchase account - be sure to check if that's available and reach out to Scirra if you need more info.
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We DO intend to make some sweeping updates when/where possible, but due to time constraints and current projects we're not there yet - the time it will take will be many hours!
That said, we definitely understand if you're running into difficulty with the C2 build - we probably had the same issues ourselves. If you'd like to reach out at nhp.main@gmail.com and give some specifics, let's see if we can't get around some of the issues quickly!
Please let us know what else we can do to help!
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-- [No]Hero