You need to login using Salesforce credentials or a session id to use FuseIT SFDC Explorer.
New Connection
Use this tab if you want to connect with username and password credentials. Consider using the OAuth Login if you don't want to expose your credentials to the app.
- Username
Salesforce username as used to sign into the Web UI - Password
Salesforce password as used to sign into the Web UI - Security Token
An additional token generated by Salesforce for use with API access. Salesforce emails the security token to new users. Changes to the password will change the security token.
See Resetting Your Security Token(if you need to reset it be aware that other applications using the API may be affected)
It will be required unless your current IP address is listed under Trusted Networksas trusted under Network Access (Salesforce → Setup → Administer → Security Controls → Network Access). - Client Id
This is the client identifier that appears in the call options header. It is only required if working on a certified app that requires API access to professional and group edition orgs. - Environment
Typically either Production for a standard org or Sandbox for an environment where you usually login with test.salesforce.com
...