Sorry Ask...
I didn´t do anything special during installation process: double click on the setup exe file... and Ok to everything (not literally, of course).
Then, TChart bartool appeared on the lazarus IDE, but not all the tools appeared into it (tcharextentlink was one of them). I installed and installed again a couple of times... and finally it appeared... so may be the process was corrupted in someway... but it is not important now since now it is installed correctly.
Thanks for your interest and efforts trying to understand my bad english.
Cheers!