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Running a jar file from a new laptop


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Looking at the pop-up box and the position of the mouse cursor, it seems you opened the client in WinRAR and then attempted to open 'GameLauncher.class' which shouldn't be opened (it contains compiled java code). 

Instead you need to close WinRAR, then right-click the file 'Roat_Pkz_Launcher.jar' and choose open with 'Java', if this is not listed you will need to click 'Choose default program...' and find it from the list. Once this is completed the client icon should change from the WinRAR '3-books' symbol to the Java 'coffee-cup' symbol. When you double-click to open it should open with Java.

Here is what I mean: https://i.gyazo.com/21bd9fb4cf7376857b833491ec08fbb5.png

Post back if you still need help.

Edited by PK Guy
added lil' pic
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