I've just asked why my 3CXPhone for Windows (User-Agent: 3CXPhone 6.0.26523.0) can't dial or receive any calls from our Asterisk PBX. We have 3CXPhone for Android (User-Agent: 3CXPhone for Android 2.0.5) working good in the same LAN. Only the Windows clients can't and it just started to happen after update to latest version 6.0.26523.0. Is it possible to download the previous versions of 3CXPhone for Windows? The filename ("3CXPhone6.msi") didn't change and our previous image got overwritten. Can you help?