IBM Rational Software Architect - Import Maven Project

Today my goal was to import an existing JEE Maven project to start looking into the code, however this turned into a day long dance with RSA.
My RSA installation featured 'Maven Tools' package, so I just needed to import the project and see it lay out in the project explorer view, however this popped up

First trick I looked up was to set -Xms256m (was -Xms40m) in eclipse.ini. It didn't look like a solution nor did it work out. Switching to external Maven 3.2.1 didn't help too and it seemed that that was an M2E internal error. After some time of playing around, the bundled maven option disappeared so I had to reinstall the maven tools package to get it back. I thought mvn clean eclipse:clean install eclipse:eclipse would do the trick but the project I got didn't show hierarchical structure and sources. Cleaning the project, updating maven configuration and reimporting in various combinations wasn't an answer as well. In the end of the day I was thinking about the tools eating away your time on operations that should in fact make your life easier. I've spent lots of time fighting with Eclipse and its derivatives and I'm really missing the times when I was free to use IntelliJ IDEA.

IBM Rational Software Architect - No application id has been found

I needed to switch my RSA from version 9.0 to 8.5.5.
IBM Installation Manager doesn't have a downgrade option, so I uninstalled the current version and installed the required one. Starting RSA I saw this

!SESSION 2014-04-15 16:41:04.514 -----------------------------------------------
eclipse.buildId=unknown
java.fullversion=JRE 1.7.0 IBM J9 2.6 Windows 7 x86-32 20130617_152572 (JIT enabled, AOT enabled)
J9VM - R26_Java726_SR5_20130617_1436_B152572
JIT  - r11.b04_20130528_38954ifx1
GC   - R26_Java726_SR5_20130617_1436_B152572
J9CL - 20130617_152572
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US
Framework arguments:  -product com.ibm.rational.rsa4ws.product.v90.ide
Command-line arguments:  -os win32 -ws win32 -arch x86 -product com.ibm.rational.rsa4ws.product.v90.ide

!ENTRY org.eclipse.equinox.app 0 0 2014-04-15 16:41:05.692
!MESSAGE Product com.ibm.rational.rsa4ws.product.v90.ide could not be found.

!ENTRY org.eclipse.osgi 4 0 2014-04-15 16:41:33.441
!MESSAGE Application error
!STACK 1
java.lang.RuntimeException: No application id has been found.
at org.eclipse.equinox.internal.app.EclipseAppContainer.startDefaultApp(Unknown Source)
at org.eclipse.equinox.internal.app.MainApplicationLauncher.run(Unknown Source)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(Unknown Source)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(Unknown Source)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(Unknown Source)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Unknown Source)
at org.eclipse.equinox.launcher.Main.basicRun(Unknown Source)
at org.eclipse.equinox.launcher.Main.run(Unknown Source)

at org.eclipse.equinox.launcher.Main.main(Unknown Source)

The shortcut to RSA was not properly updated leading to launching the wrong version. Updating part of the target field from 
com.ibm.rational.rsa4ws.product.v90.ide
to 
com.ibm.rational.rsa4ws.product.v85.ide
solved the problem.