Your plugin shouldn’t need recompiling. The DAZ Studio 4.5+ SDK is binary compatible with all builds since 18.104.22.168. The announcement thread states:
What about the plugins I have?
The DAZ Studio 4.5 SDK has not changed in any way that is binary incompatible, which means that any plugins created for a previous version of DAZ Studio 4.5.x should continue to load and function. That said, as with any new release, there is always the possibility that a plugin has had bugs fixed or features added, so the latest versions should be downloaded and installed if they are provided.