Unofficial versions do not receive automatic patches, such as the Patch 2.1.0 which introduced the ability to fish with multiple rods. Official Alternatives

Lost or Not Saving Game Data for Call of the Wild: The Angler

A for catching specific fish in the Japan Reserve. Step-by-step installation help for the official version.

Access troubleshooting for save file issues and other technical help directly from the developers. If you'd like, I can help you find: The current best price for the game on legitimate stores.