This is the only software I know to use EXRs in photoshop, but now Malwarebytes and Avira are both finding it's uninstall file and registry key file to be malware. Just thought I'd give a heads up. I've used it before and never saw these prompts, but after installing latest, I got prompts.
https://www.fnordware.com/ProEXR/ (https://www.fnordware.com/ProEXR/)
If you need an alternative, I've used this for years.
Thank you!