Do not pay for cracks. Your old serial might still work. Contact BandLab support via their forum; they are surprisingly helpful for users migrating from the old Gibson era.
Because Cakewalk was acquired by BandLab in 2018, the distribution of legacy software has changed: Existing Owners: sonar 8.5 producer download full
is legacy software (originally from Cakewalk, released around 2009–2010). It is no longer sold or officially supported by its current rights holder (BandLab/Cakewalk). Do not pay for cracks
Since SONAR 8.5 is discontinued and lacks official support, most users have transitioned to newer versions: sonar 8.5 producer download full