Shouldn't have changed during the update, although there's a possibility that the software providers have taken a stance of "better safe than sorry" if they were implementing new security measures to cater for GDPR more eloquently and didn't have an effective way to translate from the previous version to the current.
I know that certain countries have particularly harsh rules regarding "opting in" to emails and these can be a bit of a moving target.
Unfortunately, we need to keep up to date with the software updates until I manage to write my own forum software or we risk serious security breaches and falling too far behind to be able to update.
We do discussing building our own forum software, but it's going to be one HELL of a project to get to a point where we're able to do that.
Apologies if this has changed from the update, I wasn't made aware from the update notes. @ped has kindly offered to help you get back to where you need to be