- If you've downloaded the self - extracting installation package named WGCalcSetupXXXX.exe just execute it and follow the setup instructions;
- If you've downloaded the compressed archive file named like "WGCalcSetupXXXX.zip" unpack it to the temporary folder and execute the WGCalcSetupXXXX.exe file;
- After the successful installation run the program from new "WGCalculator" program group.

