Rosettavert version 1.5 is its first release as a Universal App, superceding previous versions. It should now run natively on both Intel and Apple Silicon Macs. Please note that it has nothing to do with the macOS code translation feature Rosetta – it’s all about converting text files between different code pages and formats.
If you’re running an Intel Mac and have any problems, please let me know. I’ll leave the last Intel-only version 1.4 available on the Product Page in case you’d prefer to revert to that.