In Tools+ a tool is not launched if working directory is quoted. E.g. if working dir is
$(APP_PATH)\..\some_app\bin
then tool is launched, but if working dir is
"$(APP_PATH)\..\some_app\bin"
launch fails.
"Standard" tools (Tools menu) support quoted working dir.
C::B v16.01, ToolsPlus v0.6.0