The 3.2 version of SMBconf for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac app is a product of MacParc.
The following versions: 2.0 and 1.1 are the most frequently downloaded ones by the program users. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The application's installation file is generally known as smbconf.dmg. The application lies within Internet & Network Tools, more precisely Network tools.
From the developer:
SMBconf switches to SMB 1 on OS X 10.9 or later. OS X 10.9 (Mavericks) brought SMB 2 as the default network protocol; with OS X 10.10 (Yosemite), SMB 3 was added. If you face issues connecting to your NAS, or connections to Windows file servers don't work as expected (e.g., inability to rename files or folders), it may help to switch back to the slower but more reliable SMB 1.
You may want to check out more Mac applications, such as Flame, Covenant Eyes or IPNetTunerX, which might be related to SMBconf.