First, make certain you acquired Honorbuddy only from the official site. If you acquired Honorbuddy from another source, there is a significant chance a virus or malware may have been inserted in it.
If that is the case, your Antivirus program is giving a false positive, and Honorbuddy needs to be an exception for it. If you want to make certain, run it through a wide-band virus detector like VirusTotal - Free Online Virus, Malware and URL Scanner. Its normal for 5-6 false positives out of the 50 or so tests run.
Since Antivirus programs update daily, its possible that the AV program allowed Honorbuddy one day, then decided to false-positive it another day. This is a problem with your AV, and not Honorbuddy.