Do not start the sdk manager from the zip downloaded. Just use the zip to start using the b4a sdk Manager -> Copying the tools folder to a blank folder.
Again: Everyything needed can be done (downloaded) with the B4A SDK MAnager.
That one was perfect.. thanks a Giga
Although it took about 10 minutes to download, but was self-contained and the only thing I needed was to configure the path.
I owe you one buddy