Can a league from BLS-2025 be opened with an older BLS?

No, you can’t open a league in an older version of BLS once it’s been opened in BLS-2025. Like previous versions, our software isn’t backwards compatible. When you open a league from an older BLS version in the new BLS-2025, the data gets updated and adjusted to work with the new system. These changes won’t be recognized by older versions, and some data may either be missing or moved to different places and can corrupt the data when opened with a past BLS.