Modern DiskInternals versions use online activation. Even if you paste a key from a blog, the software will phone home. If the license is flagged (and all public ones are), you’ll get a “Invalid license” or “Registration key not verified” error.
To obtain a verified registration key for DiskInternals Linux Reader, follow these steps: diskinternals linux reader registration key verified
Ext2, Ext3, Ext4, ReiserFS, HFS, HFS+, FAT, exFAT, NTFS, ReFS Modern DiskInternals versions use online activation