IzPack uninstaller doesnt remove Spark entries from Programs and Features list
Maybe this is alsoe related to other Windows versions, but i have noticed this while testing on Win7 (both 32/64).
It doesnt remove Spark from the installed programs list and also it creates two entries: Spark and Spark 2.6.0.
As Spark is using install4j again, this ticket is no longer valid.
Please check if this is still correct in 2.6.0 final. I think we do not user Lzpack anymore. Close if wrong.