I've upgraded to 5.0.2 today... and tried again...

I made a new application (test) which I could run on the tc55.

Then I tried to generate a new extension:

  test  rhodes extension anprreader
/Users/janvandijk/.rvm/rubies/ruby-1.9.3-p551/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:121:in `require': iconv will be deprecated in the future, use String#encode instead.
Generating with extension generator:
    [ADDED]  extensions/anprreader/ext.yml
    [ADDED]  extensions/anprreader/ext/Anprreader.xml
...
...
    [ADDED]  extensions/anprreader/ext/platform/android/src/com/rho/anprreader/AnprreaderSingleton.java
    [ADDED]  extensions/anprreader/ext/platform/android/src/com/rho/anprreader/AnprreaderFactory.java
Error processing: "/Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/rhodes-5.0.2/res/generators/templates/extension/extensions/montana/ext/platform/wm/Montana.sln"
/Users/janvandijk/.rvm/rubies/ruby-1.9.3-p551/lib/ruby/1.9.1/erb.rb:703:in `detect_magic_comment': invalid byte sequence in US-ASCII (ArgumentError)
  from /Users/janvandijk/.rvm/rubies/ruby-1.9.3-p551/lib/ruby/1.9.1/erb.rb:589:in `compile'
  from /Users/janvandijk/.rvm/rubies/ruby-1.9.3-p551/lib/ruby/1.9.1/erb.rb:787:in `initialize'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/templater-1.0.0/lib/templater/actions/template.rb:27:in `new'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/templater-1.0.0/lib/templater/actions/template.rb:27:in `render'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/templater-1.0.0/lib/templater/actions/template.rb:50:in `block in invoke!'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/templater-1.0.0/lib/templater/actions/template.rb:50:in `open'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/templater-1.0.0/lib/templater/actions/template.rb:50:in `invoke!'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/rhodes-5.0.2/res/generators/rhogen.rb:1021:in `block in old_step_through_templates'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/rhodes-5.0.2/res/generators/rhogen.rb:1002:in `each'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/rhodes-5.0.2/res/generators/rhogen.rb:1002:in `old_step_through_templates'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/rhodes-5.0.2/res/generators/rhogen.rb:1041:in `step_through_templates'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/templater-1.0.0/lib/templater/cli/generator.rb:75:in `run'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/templater-1.0.0/lib/templater/cli/manifold.rb:24:in `run'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/templater-1.0.0/lib/templater/manifold.rb:80:in `run_cli'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/rhodes-5.0.2/bin/rhogen:33:in `'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/rhodes-5.0.2/bin/rhodes:4:in `load'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/gems/rhodes-5.0.2/bin/rhodes:4:in `'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/bin/rhodes:23:in `load'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/bin/rhodes:23:in `'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/bin/ruby_executable_hooks:15:in `eval'
  from /Users/janvandijk/.rvm/gems/ruby-1.9.3-p551@global/bin/ruby_executable_hooks:15:in `'
➜  test

:-(