Creating a new lens flare will crash the editor, however editing an existing lens flare works fine. Since you can't duplicate them into another package, heres what to do...
1. In generic browser, Open an existing stock lensflare package (../CookedPC/Effects/FX_LensFlares.upk)
2. Double-click a lensflare to open it in the lensflare editor
3. Click Edit->"Save package", and save the package elsewhere (saves the entire package)
4. Open this new file, and rename/duplicate what you want out of it into your map file / etc..
5. You can now edit this one, and it will not crash the lensflare editor
Doesn't make sense, but it works
1. In generic browser, Open an existing stock lensflare package (../CookedPC/Effects/FX_LensFlares.upk)
2. Double-click a lensflare to open it in the lensflare editor
3. Click Edit->"Save package", and save the package elsewhere (saves the entire package)
4. Open this new file, and rename/duplicate what you want out of it into your map file / etc..
5. You can now edit this one, and it will not crash the lensflare editor
Doesn't make sense, but it works

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