DOSBox 0.73 was released today, with a slurry of improvements to speed, stability and emulation accuracy. Hence Boxer 0.86 is around the corner, and will be released next week (after testing and tweaking) to bundle the new DOSBox. This version will still be based on the same Applescript codebase as 0.85 and will include several game tweaks, installer improvements and bugfixes that came up since the 0.85 release.
An update to the 0.9 beta branch is further away, since it is integrated much more tightly with DOSBox and I need to go through the new codebase file by file sticking my grubby fingers back into it.