1.8.8 server exe crashes when run with "exception in server tick loop" error

I had a previous world that I accidentally deleted the exe file for. I downloaded the new 1.8.8 one from minecraft.net and ran it, since the original files were there (Only the exe file was deleted!). When running this, I encountered the error below, each time I ran it. I tried more then 8 times.

Description: Exception in server tick loop
com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 2 column 2
	at com.google.gson.Gson.assertFullConsumption(Gson.java:779)
	at com.google.gson.Gson.fromJson(Gson.java:769)
	at mb.g(SourceFile:125)
	at kn.z(SourceFile:99)
	at kn.<init>(SourceFile:25)
	at ko.i(SourceFile:172)
	at net.minecraft.server.MinecraftServer.run(SourceFile:421)
	at java.lang.Thread.run(Thread.java:745)
Caused by: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 2 column 2
	at com.google.gson.stream.JsonReader.syntaxError(JsonReader.java:1505)
	at com.google.gson.stream.JsonReader.checkLenient(JsonReader.java:1386)
	at com.google.gson.stream.JsonReader.doPeek(JsonReader.java:531)
	at com.google.gson.stream.JsonReader.peek(JsonReader.java:414)
	at com.google.gson.Gson.assertFullConsumption(Gson.java:775)