Had sign in problems after changing my Gmail password. Turns out it is Gmail that causes the sign-in problem.
After support assisted, iTeleport began working again.
Quick response and functionality is back its great self. Four stars bro.
If you have the passeord problem as I did, please take the following steps :
Log into your Google Account
Select Security on the top horizontal menu
Scroll down to Account permissions and choose Settings (Access for less secure apps)
Select Enable and then click Done
Now try to sign-in in iTeleport
Starscream_2k15 about iTeleport Remote Desktop, v6.2.9