How does one upgrade to a new version? I installed clean 3CX on Debian 8 back in November 2016, i believe it's version3. Blog post with SP4 was published in December 12, 2016. http://www.3cx.com/blog/releases/linux-pbx-release-candidate/ There is nothing on this page says how to upgrade. My 3CX control panel - 'Updates' menu does not show there is a new SP. Also checked Settings->Parameters "SP_VERSDESC" shows as "SP." - so i cant even tell what 3CX software is installed on my server. Also checked my account https://customer.3cx.com/enduserportal my PRO license says: Version 15.0 What does it all mean? - extremely confusing.