Welcome to release v1.2, after quite a bit of feedback I've decided to retire my beloved custom KDF and implement PBKDF2-HMAC-SHA256. There are more details outlined here.
You get the option between 100k rounds or 600k rounds.
The 600k build provides greater resistance to offline password guessing but takes longer to unlock on the CH569 (3 mins). The 100k build unlocks faster (30 seconds), but requires only one-sixth as much work per password guess and is below OWASP’s current recommendation. Choose based on the security/performance trade-off appropriate for your use case.