If you've forgotten your CRM password, you can follow these instructions for resetting.
If you know your password but want to reset it, from within your CRM go to Manage Your Account —> Manage Database Users & Teams:
From this page, locate your name in the Current Database Users section and then right-click anywhere within the row containing your name. For demonstration purposes, let's say George Clinton wants to change his Redtail password:
You can see above that George has right-clicked the row with his name in it and now sees a popup box that includes an option to Change Password. After clicking that, George would see the below:
Then, it's just a matter of typing in your current password (in the "Your Password" field), new password, confirming the new password and clicking Change Password.
Note: You must be an admin user of the database in order to have access to the Manage Database Users & Teams page. If you are not, you would need to reset using the reset method described here.