Runtime detection doesn't work for 3.4.0 with the whitelist. A regex would be better

steps:

1. EXE: Preferences > JBoss Runtime Detection > Download
2. ASSERT: List of available runtimes shows up, containing CDK 3.4.0
3. EXEC: Choose "CDK 3.4.0" & hit "Next"
4. EXEC: next page: provide credentials & hit "Next"
5. EXEC: next page: accept the terms & hit "Next"
6. EXEC: next page: use the suggested defaults, make sure that "Install folder" is a separate folder (ex. freshly created ~/cdk/) & hit "Finish"
7. ASSERT: wait for the download to finish

Result:
The download wont detect the new CDK 3.4.0 that you just downloaded