If you don't feel totally safe with MultiMC than here's a link to the old launcher.Quote from ilovelotsofpie
Scroll to the bottom and there should be an option that says,"Show old download options"
Click it and choose which system you are using.
It'll give you a direct download, so save it wherever and you should have the old launcher back!
*Note!* Keep in mind that you will not be able to use any versions past 1.5.2 with this launcher.