Use actual JFlex.jar version

[VladBozhenok]

Hi, when Im trying to "Run Jfex generator" it tryes to download https://github.com/JetBrains/intellij-community/raw/master/tools/lexer/jflex-1.4/lib/JFlex.jar, but currently it doesnt exist in repository. About two weks ago developers of intelliij-community replaced it by new version jflex-1.7.0-SNAPSHOT.jar. Obviously this is a reason of issue. Could you please take a look.

[tnnn]

It appears to be a Grammar-Kit issue. It was already reported - take a look at JetBrains/Grammar-Kit#112 (you will also find a temporary solution to your problem there).

[VladBozhenok]

Thanks, it should help for a while