This hotfix can be downloaded from the Wolken Customer Portal Web support.tibco.com ,using your username and password. Once logged in you can find the hotfix under Download Menu :
AvailableDownloads/BusinessWorks/Plugins/Salesforce/6.11.0/hotfix-002

Listed below is a summary of updates included. 
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Closed Issues in 6.11.0_HF-002 (This Release)

ASFC-2489 : The runtime will always use port 8443 if connecting to salesforce sandbox

ASFC-2491 : With new connected app for OAuth authentication fails with timeout exception using Salesforce Plugin 6.11.0

ASFC-2504 : The GetSession activity will accumulate the orgid in the serverUrl

ASFC-2500 : The null object in the log: CometD Meta Connect Error : null

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Closed Issues in 6.11.0_HF-001

ASFC-2434 : Salesforce Subscriber activity fails to retry for non-retryable errors caused while receiving platform events from Salesforce Server.

ASFC-2431 : Last Platform Event is getting resubscribed

ASFC-2420 : Salesforce subscriber not retrying for 403 error code

ASFC-2460 : For create activity, if set the AssignmentHeader, the plugin will not send request to the server

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Known Issues in 6.11.0_HF-001,6.11.0_HF-002 (This Release)

ASFC-2403 : Missing Salesforce Platform Events issue seen intermittently

Workaround: None

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Please refer to the attached read me file for any additional information.

All Supported OS

TIBCO ActiveMatrix BusinessWorks(TM) Plug-in for Salesforce 6.11.0 Hotfix 02 is now available.