I recently upgraded to MacOS Catalina, and had the same problem. The issue is that Catalina has very strict file permissions. I was forced to go to System Preferences -> Security & Privacy -> Full Disk Access
From there I added /System/Library/CoreServices/Jar Launcher.app
My Mac is now less secure, but at least Hero Designer can find my characters!
Thank you! I just got a new iMac to replace my MacBook and had the same problem described in this thread. Making the Full Disk Access change you described fixed it. 🙏
Hero Designer does not recognize any file type on my Mac
in HERO Designer
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Thank you! I just got a new iMac to replace my MacBook and had the same problem described in this thread. Making the Full Disk Access change you described fixed it. 🙏