“byhss” → axgrr? No. Maybe ROT3? b→y, y→v, h→e, s→p, s→p → “yvepp” no.
Better approach: Maybe they encoded English words by shifting each letter by +1, but the phrase “Download-” is plaintext. Then “byhss” shifted back 1 → “axgrr” — nonsense. Download- byhss ly tyz mhjbt msryt fy alatwbys...
If “alatwbys” original intended = “alautobees” → “alatwbys” shift +1: a→b, l→m, a→b, u→v, t→u, o→p, b→c, e→f, e→f, s→t → “bmbvupcfft” no. “byhss” → axgrr
I realize: Maybe it’s a .