crash followed by success (with some plugins loaded in between)

tilemill.log

[tilemill] Started [Server Core:20009].
[tilemill] Client window created (pass --server=true to disable this)
[tilemill] path.exists is now called `fs.exists`.
[tilemill] [tilemill-ui] Note: Unknown option "updatesVersion" in config file.
[tilemill] [tilemill-ui] Note: Unknown option "updatesTime" in config file.
[tilemill] [tilemill-ui] path.exists is now called `fs.exists`.
[tilemill] [tilemill-ui] Rendering export
[tilemill] [tilemill-ui] Persisting state in C:\Users\William Morris\Documents\MapBox\export\bluemarble2.export every minute
[tilemill] [tilemill-ui] Completing export process
[tilemill] [tilemill-ui] Exiting process [tm-bluemarble2.mbtiles]
Starting TileMill...
Note: Unknown option "updatesVersion" in config file.
Note: Unknown option "updatesTime" in config file.
[tilemill] Note: Unknown option "updatesVersion" in config file.
[tilemill] Note: Unknown option "updatesTime" in config file.
[tilemill] Started [Server Tile:20008].
[tilemill] Plugin [carto] loaded.
[tilemill] Plugin [editor] loaded.
[tilemill] Plugin [fonts] loaded.
[tilemill] Plugin [templates] loaded.
[tilemill] Started [Server Core:20009].
[tilemill] Client window created (pass --server=true to disable this)
[tilemill] path.exists is now called `fs.exists`.
[tilemill] npm
[tilemill]  
[tilemill] http 
[tilemill] GET https://registry.npmjs.org/-/all/since?stale=update_after&startkey=1347289007000
[tilemill] npm
[tilemill]  
[tilemill] http 200 https://registry.npmjs.org/-/all/since?stale=update_after&startkey=1347289007000
[tilemill] npm
[tilemill]  
[tilemill] http
[tilemill]  
[tilemill] GET https://registry.npmjs.org/tilemill-browser-preview
[tilemill] npm http
[tilemill]  GET
[tilemill]  https://registry.npmjs.org/tilemill
[tilemill] npm
[tilemill]  http 
[tilemill] GET https://registry.npmjs.org/tilemill-autopilot
[tilemill] npm http
[tilemill]  GET https://registry.npmjs.org/tilemill-easey
[tilemill] npm 
[tilemill] http 
[tilemill] GET https://registry.npmjs.org/tilemill-josm-remote
[tilemill] npm http
[tilemill]  GET
[tilemill]  https://registry.npmjs.org/tilemill-lots
[tilemill] npm
[tilemill]  http
[tilemill]  GET
[tilemill]  https://registry.npmjs.org/tilemill-mapbox-streets
[tilemill] npm 
[tilemill] http 
[tilemill] GET
[tilemill]  https://registry.npmjs.org/tilemill-reference-layer
[tilemill] npm
[tilemill]  
[tilemill] http
[tilemill]  
[tilemill] 304
[tilemill]  https://registry.npmjs.org/tilemill-browser-preview
[tilemill] npm
[tilemill]  
[tilemill] http
[tilemill]  304 https://registry.npmjs.org/tilemill
[tilemill] npm
[tilemill]  
[tilemill] http
[tilemill]  
[tilemill] 304
[tilemill]  https://registry.npmjs.org/tilemill-lots
[tilemill] npm 
[tilemill] http
[tilemill]  
[tilemill] 304
[tilemill]  https://registry.npmjs.org/tilemill-josm-remote
[tilemill] npm 
[tilemill] http
[tilemill]  
[tilemill] 304 https://registry.npmjs.org/tilemill-easey
[tilemill] npm
[tilemill]  
[tilemill] http
[tilemill]  
[tilemill] 304
[tilemill]  https://registry.npmjs.org/tilemill-mapbox-streets
[tilemill] npm
[tilemill]  
[tilemill] http
[tilemill]  
[tilemill] 304
[tilemill]  https://registry.npmjs.org/tilemill-reference-layer
[tilemill] npm
[tilemill]  
[tilemill] http
[tilemill]  
[tilemill] 304 https://registry.npmjs.org/tilemill-autopilot
[tilemill] npm
[tilemill]  
[tilemill] http
[tilemill]  GET
[tilemill]  https://registry.npmjs.org/tilemill-reference-layer
[tilemill] npm
[tilemill]  
[tilemill] http
[tilemill]  304
[tilemill]  https://registry.npmjs.org/tilemill-reference-layer
[tilemill] tilemill-reference-layer@0.2.0 ..\..\Users\William Morris\.tilemill\node_modules\tilemill-reference-layer
[tilemill] Stopping core server...
[tilemill] Restarting child process: "core"
[tilemill] Plugin [carto] loaded.
[tilemill] Plugin [editor] loaded.
[tilemill] Plugin [fonts] loaded.
[tilemill] Plugin [templates] loaded.
[tilemill] Plugin [tilemill-reference-layer] loaded.
[tilemill] Started [Server Core:20009].
[tilemill] npm
[tilemill]  
[tilemill] http GET https://registry.npmjs.org/-/all/since?stale=update_after&startkey=1347289007000
[tilemill] npm
[tilemill]  
[tilemill] http 200 https://registry.npmjs.org/-/all/since?stale=update_after&startkey=1347289007000
[tilemill] [tilemill-ui] Note: Unknown option "updatesVersion" in config file.
[tilemill] [tilemill-ui] Note: Unknown option "updatesTime" in config file.
[tilemill] [tilemill-ui] path.exists is now called `fs.exists`.
[tilemill] [tilemill-ui] Rendering export
[tilemill] [tilemill-ui] Persisting state in C:\Users\William Morris\Documents\MapBox\export\buffalo_comp4.export every minute
[tilemill] [tilemill-ui] Completing export process
[tilemill] [tilemill-ui] Exiting process [tm-buffalo_comp4.mbtiles]