For exaple, it doesn´t recognize my inits (I used them to give the initial values like [init 23].
What happened to it? Is there a document that shows all the changes made?

Vanilla's Changelog (don't know if this is complete):
https://msp.ucsd.edu/Pd_documentation/resources/chapter5.htm

You probably used Pd-Extended 15 years ago!?
Extended is discontinued, but you can add libraries to Vanilla.
There is 'Deken' now: Pd-menu > help > find externals online .
There is also this website of Deken, which helps to find missing objects: deken.puredata.info
So [init] is part of IEMlib.
But is also easily replaceble as Vanilla abstraction:

[loadbang]
|
[args 0(
|
[pdcontrol]
|
[list trim] [inlet]
|/
[outlet]

pdcontrol did not exist 15 years ago.
All Vanilla objects: help > list of all objects

And there is the compatibility message to revert Vanilla to an old version:
[;pd compatibility 0.52(

see message-helpfile > pd-messages

There have been many many improvements to Pd, intelligent patching for example.
And documentation also improved a lot!

It has been a big shift when Pd went from 32 to 64 bit. In this transition some libraries have not been updated and I think it has been that time where Extended discontinued. You can still download it and run your old patches there ...

@lacuna small correction: as of Pd-0.55.0, the Deken plugin is found under Tools in Pd's menu.

@lacuna Thank you! I will study it again. I'll try to update and keep the new version and see the improvements.

@alexandros Thank you!