Update README.md

README.md

@@ -7,3 +7,9 @@ This is a very simple tool that lets you draw on a CSGO radar image to get a mos
 This is currently an early build. If you have comments or suggestions I am open to adding features as required.
 
 Download: [Latest](https://github.com/7ark/Radar-Timing-Tester/releases/latest)
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+Troubleshooting Guide:
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+- I uploaded a photo but got a warning that it couldn't find a .txt associated with the radar
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+Currently RTT will automatically try to find your .txt radar data from the image you give it. I will probably allow you to manually select this in the future, but for the time being I suggest only selecting pngs from your resources/overviews folder, so that the tool can automatically find your file.