Program runs after installing, but cannot be started again. Also other binaries such as HD-ApkHandler cannot be started.
The problem is caused by a System.NullReferenceException.
I started the MS Visual Studio debugger which reveals that the exception is thrown in "BlueStacks.hyperDroid.Common.RTDLMgr.CheckInstallStatus". In the disassembly it's at line 0x31 for "HD-Restart.exe" and line 0x47 for "HD-ApkHandler.exe"
The disassembly for these offsets is "cmp dword ptr [ecx],ecx" in both cases.