NOTE -- you will need to use Firefox or some other non-Chrome browser to install.
NOTE -- this was built for AEM 6.5
From some light-testing on a local instance installing the Hotfix won't break 6.4.
It brings the minor version up from 1.2.60 to 1.2.100.
There's virtually zero active development within the CRX space of AEM. It's a very mature part of the product. So changes across AEM versions is generally minimal.
You should be okay with this fix. Test on a local first.
The fix won't be available in a service pack until :
@aemmarc , if that is the case (which would be awesome, by the way!) it would be a good idea to get that details added to the SP release notes:
Thanks for the information!