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don't see a file to run, so how do you start the game

it's a java game, so you need to have java installed and then you just double click the file

i found out you need to right click the .rar file and chose to run with java, then it asked me to create a save and as soon as i do it crashes

If you don't have the .jar file associated with java, you could also create a simple batch file (for e.g. run.bat) with the following content:
java -jar SolarColony.jar

the run.bat worked, thanks