Eclipse Portable 4.4

Currently the launcher is using 32 bit version of Eclipse, and if I install Java 64 bit I get exit code 13 when I launch Portable Eclipse.

Is there a way to configure the launcher to start the 64 bit Eclipse instead? If I download Eclipse from eclipse.org it will run 64 bit by default.

UPDATE:
Well, I figured it out. The portable version has the 32 bit version of Eclipse in it. To run the 64 bit version of Eclipse just download it from eclipse.org and put it in EclipsePortable\App\Eclipse.

I am happily authoring and compiling using Eclipse Portable and Java Portable from a flash drive. But for projects I'm working on now, I am required to generate a javadoc of the code. I have tried in vain to simply point Eclipse to the javadoc.exe and receive this response:

"Error occurred during initialization of VM
java/lang/NoClassDefFoundError: java/lang/Object"

Is there some magic I need to do to clear this up? Would you happen to know what it is?

Also, an earlier comment mentioned success in making Portable Eclipse into the 64-bit version simply by over-writing in a certain directory. I have tried over-writing just the two files eclipse.exe and eclipsec.exe into the mentioned directory app\eclipse but I received a message: "The Eclipse executable launcher was unable to locate its companion shared library".

Would you happen to know what I could do more thoroughly in order to please 64-bit Eclipse that all of its friends are present so that it can play?

It seems Eclipse-Portable does not work fine with Maven.
On a brand new install I successfully installed several plugins, including m2e.
Unfortunately m2e seems unable to fetch artifacts (I checked: repositories are accessible from my machine, despite firewalls and such).
Trying to create a new Maven project results in error:

Could not resolve archetype org.apache.maven.archetypes:maven-archetype-quickstart:RELEASE from any of the configured repositories.
Could not resolve artifact org.apache.maven.archetypes:maven-archetype-quickstart:pom:RELEASE
Failed to resolve version for org.apache.maven.archetypes:maven-archetype-quickstart:pom:RELEASE: Could not find metadata org.apache.maven.archetypes:maven-archetype-quickstart/maven-metadata.xml in local (C:\Users\uidr5738\.m2\repository)
Failed to resolve version for org.apache.maven.archetypes:maven-archetype-quickstart:pom:RELEASE: Could not find metadata org.apache.maven.archetypes:maven-archetype-quickstart/maven-metadata.xml in local (C:\Users\uidr5738\.m2\repository)

and relevant maven error is:

#NOTE: This is an Aether internal implementation file, its format can be changed without prior notice.
#Tue Apr 28 12:01:54 CEST 2015
maven-metadata-central.xml.error=Could not transfer metadata org.apache.maven.archetypes\:maven-archetype-quickstart/maven-metadata.xml from/to central (http\://repo.maven.apache.org/maven2)\: connect timed out
maven-metadata-central.xml/@default-http\://repo.maven.apache.org/maven2/.lastUpdated=1430215314723

... sure enough I can access "https://repo1.maven.org/maven2/org/apache/maven/archetypes/maven-archety..." with content:

<metadata>
  <groupId>org.apache.maven.archetypes</groupId>
  <artifactId>maven-archetype-quickstart</artifactId>
  <versioning>
    <latest>1.1</latest>
    <release>1.1</release>
    <versions>
      <version>1.0-alpha-1</version>
      <version>1.0-alpha-2</version>
      <version>1.0-alpha-3</version>
      <version>1.0-alpha-4</version>
      <version>1.0</version>
      <version>1.1</version>
    </versions>
    <lastUpdated>20100501173945</lastUpdated>
  </versioning>
</metadata>

(notice discrepancy in "lastUpdate", if at all significant)
Any idea about what I'm doing wrong?

Eclipse 4.5 released. Are you going to update?

Edit: I took over this project. A new Dev Test is available here.