I posted a tutorial of how to port/use SDK v1 in newer versions of Construct using Jail Break.
Check the tutorial here: construct.net/en/tutorials/break-sdkv2-encapsulation-3256
There are some Add-ons that are impossible to port using SDKv2, and thus the only alternative is Jail Break it. I will accept requests for porting such Add-ons here and on Discord.