[Rossi D]

Prostě jak já tomu rozumím, citace přímo ze stránek autora TC:

Allows to access remote servers via secure FTP (FTP via SSH). Requires SSH2. This is NOT the same as SCP! The plugin is no longer based on Putty source code, but uses the OpenSSH DLLs. 

This plugin needs the DLLs libeay32.dll, libssh2.dll and zlib1.dll in the same directory as the plugin, or the Totalcmd directory. The DLLs can be found in the libcURL package at the following address: 
32-bit: curl.haxx.se: In the section named "Win32 - Generic", download the following package (or a newer one): 
Win32 2000/XP 7.40.0 libcurl SSL enabled Günter Knauf 2.84 MB 
64-bit: curl.haxx.se: In the section named "Win64 - MinGW64", download the following package (or a newer one): 
MinGW64 7.40.0 devel SSL SSH Günter Knauf 2.15 MB 

Unpack ALL the DLLs from this package to the same directory (NOT TO A SUBDIRECTORY) to which you auto-installed sftpplug.wfx, or to the Totalcmd directory. The 64-bit DLLs may be put in subdir "64". 
Source available.

Soubory *.dll musí přijít do té samé složky kde je přítomen plugin sftpplug.wfx (i wfx64), nesmí být mimo či v podadresáři ...