Latest version of avast is 2015.10.0.2209
Even if that were not a beta build, it is the virus definitions which are detecting this and they are independent of the program version.
@ RonSH
I suspect this is a false positive as the C:/HP/BIN location is normally associated to HP systems and their tools, etc. for a factory restore. Some of these tools have in the past been detected as they can have a dual purpose (to do said restore) that may appear suspect.
You don't say what the file name is ?
You should submit this (from the chest, see attached image, click to expand) to the avast virus labs as a possible false positive for analysis.