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I understand,
Today I tried to update, and disappointingly it seems that there is a lot of work that still needs to go in the project. I have reverted to the old installation.
Unfortunately this also means that I will have to wait even longer for the appointments to work.
I have disabled the appointments plugin for the time being. I hope that you will advise me when it is actually safe to upgrade and then have appointments working.
@sohohosts
It's upto you whether you want to use its version now or later. We are working daily to convert other addons to make it compatible with version 4
When we will launch 4.1 version. It will be going to the most stable one with more number of supported addons :)
closing this topic now