The short answer is: Yes!
* Update * The error described below can be fixed. See the update in the description.
I just quickly tested if the Rational Team Concert 4.x Extensions Workshop works with the newest release 5.0 and I was able to successfully smoke test it. The same applies to newer versions of RTC.
To test if it still works, I performed Lab 1 completely. The new setup tool introduced recently ran like a charm and this was successful.
I then ran Lab 2 and finally Lab 5 with the complete code accepted. All labs worked as advertised. I would not expect any surprises in Lab 6 (except the normal issues when trying to deploy).
As there are some things that I notice that are different from the 4.x versions. I will summarize them here.
After setting up the SDK an error shows up in some of the project explorers. The error looks like below in the project explorer:
To get around it, when launching, use this dialog to skip this issue:
* Update *
To get rid of this error you can delete the folder resources in the SDK folder installs/rtc-sdk/plugins/com.ibm.team.log4j.ui_1.2.0.v20140307_1622 after extracting the SDK.
In the other labs, the only thing that seemed to be different is that the Eclipse password secure storage is getting more persistent. You should probably provide a password, to avoid having to deal with it every time.
So you can run the Rational Team Concert 4.x Extensions Workshop with the current Rational Team concert version 5.0 and it is likely it will run also with later versions.
As always, I hope the code above helps someone out there with extending RTC.