IDE 1.8.0 Released -- update: 1.8.10

I installed 1.8.0 to my xp platform...

1/ it seems a lot slower than my previous 1.6.9 installation.

2/ on running a good sketch and trying to upload to a nano, it wouldn't, and provided the trace below in red..

java.io.IOException: Cannot run program "REMOVE/bin/avrdude": CreateProcess error=2, The system cannot find the file specified
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
at processing.app.helpers.ProcessUtils.exec(ProcessUtils.java:26)
at cc.arduino.packages.Uploader.executeUploadCommand(Uploader.java:129)
at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:207)
at cc.arduino.UploaderUtils.upload(UploaderUtils.java:78)
at processing.app.SketchController.upload(SketchController.java:709)
at processing.app.SketchController.exportApplet(SketchController.java:682)
at processing.app.Editor$DefaultExportHandler.run(Editor.java:2190)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified
at java.lang.ProcessImpl.create(Native Method)
at java.lang.ProcessImpl.(ProcessImpl.java:386)
at java.lang.ProcessImpl.start(ProcessImpl.java:137)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
... 8 more
An error occurred while uploading the sketch

any ideas ?thanks

Allan