Eclipse - An internal error occurred during: "Compute launch button tooltip"

Got this from another site of some guy who got this same error after upgrading. Worked for me as well. Apparently putting the following line in your eclipse.ini helps:

-Dcom.ibm.icu.util.TimeZone.DefaultTimeZoneType=ICU

Try setting the launch properties in:

Window>Preferences>Run/Debug(Expand)>Launching(Click)

Under launch Operations menu set it to:

Always launch the previously launched application

Click:

Apply>Ok