enable the insecure AES CBC ciphers

I am running SmartFTP Library and got the "Key exchange failed" error. 
2015-04-08T11:38:17 SmartFTP FTP Library 4.0.456.0
2015-04-08T11:38:26 Resolving host name "<ftp host>"
2015-04-08T11:38:26 Connecting to <ip address> Port: 22
2015-04-08T11:38:26 Connected to <ftp host>.
2015-04-08T11:38:26 SSH protocol version reply. Client Id: SSH-2.0-SmartFTP
2015-04-08T11:38:26 SSH-2.0-JSCAPE
2015-04-08T11:38:26 Starting SSH session. Remote Id: "SSH-2.0-JSCAPE"
2015-04-08T11:38:26 Server Algorithm Suite
Key Exchange: diffie-hellman-group1-sha1
Server Host Key: ssh-rsa
Client to Server Encryption: blowfish-cbc,3des-cbc
Server to Client Encryption: blowfish-cbc,3des-cbc
Client to Server HMAC: hmac-sha1,hmac-md5
Server to Client HMAC: hmac-sha1,hmac-md5
Client to Server Compression: none
Server to Client Compression: none
2015-04-08T11:38:26 Key exchange failed.
2015-04-08T11:38:26 Client closed the connection.
This problem was solved in the following post:
www.smartftp.com/forums/index.php?/topi ... iled/</div>
The solution was to: Manually enable the insecure AES CBC ciphers in the SSH dialog in the favorite properties
I believe that solution was for SmartFTP client. How can I enable the ciphers in the SmartFTP library code?

The AES CBC ciphers have been enabled again by default in the FTP Library.
Can you reproduce the problem with SmartFTP Client?

I don't own a copy of the SmartFTP client (my 30 day trial expired), but I did try several other things.
1) FileZilla connects OK.
2) An older version of SmartFTP library connect OK. Here is the log:
[20150414 21:44:21] SmartFTP FTP Library
[20150414 21:44:21] Resolving host name "<ftp host>"
[20150414 21:44:21] Connecting to <ftp ip> Port: 22
[20150414 21:44:21] SSH-2.0-JSCAPE
[20150414 21:44:21] Starting SSH session. Remote Id: "SSH-2.0-JSCAPE"
[20150414 21:44:21] SSH protocol version reply. Client Id: "SSH-2.0-SmartFTP"
[20150414 21:44:22] Key Exchange Algorithm: diffie-hellman-group1-sha1
[20150414 21:44:22] Key exchange completed.
[20150414 21:44:22] Host Key Algorithm: ssh-rsa
[20150414 21:44:22] Client to Server Encryption: 3des-cbc
[20150414 21:44:22] Server to Client Encryption: 3des-cbc
[20150414 21:44:22] Session MAC: hmac-sha1
[20150414 21:44:22] Client to Server Compression: none
[20150414 21:44:22] Server to Client Compression: none
[20150414 21:44:22] Requesting service "ssh-userauth".
[20150414 21:44:22] RTT: 28.611 ms
[20150414 21:44:22] Authentication request. Method: "none"
[20150414 21:44:22] Server supported authentications: password,publickey
[20150414 21:44:22] Authentication request. Method: "password"
[20150414 21:44:22] User authentication successful.
[20150414 21:44:22] SSH session established.
[20150414 21:44:22] Connected to sftp2.mcmcg.com.
[20150414 21:44:22] Detected Server Software: JSCAPE Secure FTP Server
[20150414 21:44:22] Opening channel 0.
[20150414 21:44:22] Channel successfully opened (Local=0, Remote=0).
Does this shed any light on why the new FTP library cannot connect?

Still waiting for any suggestions on this. It continues to work great with the older version of SmartFTP library, but I have to start running it on a new computer as Windows XP has been deprecated. The new OS requires the newer version of SmartFTP library, which I purchased just for this purpose and it won't work.

Please try the previous suggestion. Then report back with the results. For further assistance please contact us by email.

I purchased a copy of SmartFTP client so that I could try your suggestion. Here is the log when I try to connect:
[15:42:55] SmartFTP 6.0.2136.0
[15:42:55] 1>Resolving host name "<ftp client>.com"
[15:42:55] 1>Connecting to <ftp IP> Port: 22
[15:42:55] 1>Connected to <ftp client>.com.
[15:42:55] 1>SSH protocol version reply. Client Id: SSH-2.0-SmartFTP
[15:42:55] 1>SSH-2.0-JSCAPE
[15:42:55] 1>Starting SSH session. Remote Id: "SSH-2.0-JSCAPE"
[15:42:56] 1>Server Algorithm Suite
             Key Exchange: diffie-hellman-group1-sha1
             Server Host Key: ssh-rsa
             Client to Server Encryption: blowfish-cbc,3des-cbc
             Server to Client Encryption: blowfish-cbc,3des-cbc
             Client to Server HMAC: hmac-sha1,hmac-md5
             Server to Client HMAC: hmac-sha1,hmac-md5
             Client to Server Compression: none
             Server to Client Compression: none
[15:42:56] 1>Key exchange failed.
[15:42:56] 1>Client closed the connection.
Filezilla connects fine with the same credentials, and the old version of SmartFTP library works on an XP machine.
I need to get this running on a Windows 7 machine.
Any thoughts on what my next step is?

In SmartFTP:
- Go to the Tools - Favorite Properties
- Go to the SSH - Advanced dialog
- Set the Encryption option to Use favorite settings
- Check 3DES
- Click OK
- Restart SmartFTP
For the problem with the FTP Library:
Install the latest version https://www.smartftp.com/ftplib/download
It comes with 3DES pre-enabled

Thank you. This solution works.