As the people who have looked at the launcher log know, we can deduce that the problem starts after the CDN download.
<input> (0): Unable to find function resetCanvas
Loading compiled script base/defaultProfiles.cs.
Loading compiled script base/customProfiles.cs.
Loading compiled script base/messageBox.cs.
Loading compiled script base/MessageBoxOKCancelDlg.gui.
Failed to load profile bitmap ()
Loading compiled script base/MessageBoxOkDlg.gui.
Loading compiled script base/MessageBoxYesNoDlg.gui.
Loading compiled script base/launcherGui.gui.
Downloading manifest from 'http://update.blockland.us/latestVersion.php'...
81529 bytes retrieved
CDN Download finished
Removed 559 file requests due to download prefs
Then after spam of all the blobs that it can't download because of the server connection it just closes.
Writing out game files...
Skipping file /Add-Ons/Brick_V15.zip with hash 9c5ea6ea43448e11750ff6becbd4f 4f9d50d5bfa, bits unavailable.
Shutting down the OpenGL display device...
Cleaning up the display device...
Killing the texture manager...
Making sure the rendering context is not current...
Deleting the rendering context...
Destroying the window...
So this means that the problem comes, not from the Brick_V15 (because its the add on it first downloads) but from the actual connection to the server where its supposed to download, I had a spark of idea to put permissions in downloads to read and write but that didn't work... Now, there is no indication in the launcher.log that the Launcher couldn't write to any folder. So the solution must be resolved by Badspot (or whoever manages the server from which we download). Furthermore to backup this argument I attempted to go to the site which it downloads the manifest from and Plop i get
ERROR Bad user agent 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5; rv:6.0.2) Gecko/20100101 Firefox/6.0.2'
That could plainly signify that I can't access the page from Mozilla Firefox, but it could mean that I can't access because it is somehow closed. This is my reflection on the case. It may or not be helpful. Thank you.