Regarding the "no window/no icon" issue some are reporting, I have some details of my own. I tried the latest build tonight on my Win10 64-bit Home system tonight and had the same problem - no icon in the task bar, no program window. I opened the Windows Task Manager and found the ATR Tools process was present but consuming 0% CPU time and basically not doing anything.
So I went to the Details tab of the Task Manager, right clicked on the process and selected "Analyze wait chain" - it seems that for some reason, ATR Tools was waiting for another running task on my laptop (Roland Cloud Manager, a background application for account validation and download/access to Roland VST soft-synths). I killed the Roland Cloud Manager process and the ATR Tools window and taskbar icon both appeared immediately.