You can check the hashes by installing Hashtab on your windows PC/Mac or using the "sha" or "md5" function in the terminal/console if you're using Linux/Mac.
This way you'll be able to check the MD5/SHA hash of your Launcher.dat file.
This way you'll be able to check the MD5/SHA hash of your Launcher.dat file.
The Gateway launcher MD5/SHA:
1.0 MD5: 062b40817fa7e1ec4b12fb8c1a9b4310
1.1 MD5: 3a06e08a703c5ca2d43cf5ff7fcd3526
1.2 MD5: 5A0775D695FFF7C2F2F1574220E25E21
2.0b1 MD5: BF354D2616601715EE10269BB6DCDA8D
2.0b2 MD5: 6361C5D4935AF6D888FFC0646548F5DD
1.2 SHA: A114D5A166BA3C4B2979C9DEE6093DD7D96614FB
2.0b1 SHA: 89EDB4D7EC657D0B8FA6FED3E9AB32701EAE5014
2.0b2 SHA: 3508A54DD3B1FF903FBF18ECF97B075205B67D0C
Hashtab:
Right click the file, click on Properties and then on the File Hashes tab.
Linux/Mac:
Go to the console/terminal and type in "sha" or "md5".
Drag the launcher.dat into the terminal/console.
The "bricking" only occurs on the beta 2.0 launchers due to a special code.
There are reports of bricked consoles with unmodified launchers, however most of the bricks occur from cloned launchers and modified ones.
Here's a thread with more MD5 hashes.
Cheers to Green cat for the console/terminal method and various people for the various MD5/SHA hashes.
Anyone that got Mac/Linux screens, feel free to PM me!
Thread under construction.