Error: Unable to push content

**Brackets version:** Release 1.5 build 1.5.0-16538 (release cf9cf4698)
**AEM Brackets Extension:** 0.0.13
**OS and architecture:** OSX El Capitan 10.11.1
#### Steps to reproduce:

Make change in Brackets + save changes.
OR Export Package Content to server
OR Import Package Content from server
#### Expected outcome

Frontend changes should be synced across to AEM directory.
#### Actual outcome

Get error messages:
- Unable to push content for ``: Cannot establish a connection to server http://localhost:4502: EPIPE.
- Unable to push content for ``: Cannot establish a connection to server http://localhost:4502: EPIPE.
- Unable to pull content for ``: Cannot establish a connection to server http://localhost:4502: EPIPE.
- **(When starting Brackets)** Error uploading Sling dependencies. Error posting to http://localhost:4502/apps/system/install. Code:ECONNRESET

I've tried adding a trailing slash to the Server URL in project settings.

Also tried different versions of Node.js including v0.12 and v5.1.1

Also moved the AEM instance to a different directory.

I'm a bit lost for what else to do.

Start by reproducing the save, export, and import flows against the AEM server at http://localhost:4502, including the startup upload to /apps/system/install. Trace the connection failures reported as EPIPE, ECONNRESET, and Code:ECONNRESET. Done means content sync and Sling dependency upload work without connection errors.

Written by the indexing model from the issue text.