Linux SP4 Version Upgrade

[MVpbx]

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.

 

[YiannisH_3CX]

Hi @MVpbx

On your dashboard under the information column there is a line named License, next to it there is a build number.
Can you tell us what that is?
Sp4 is 15.0.60903.0

 

[MVpbx]

Thanks @YiannisH_3CX, it's 15.0.60903.0
I don't remember installing SP4, but i might .. hmm.
Now i can relate this finding with emails stopped being delivered out of blue.