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1. Download another program.
Different file extensions work with different programs, and it can be difficult to figure out which program opens which files. Here are a few programs that usually work with GRO files:
- Unknown Apple II File
- Warlords Battlecry Archive
- HP-48/48sx/49 Graphic Object Bitmap
- Genbox Family History Report Options
- Serious Sam Game File
You can download one of these programs from the software developer’s website.
2. Look at the file type.
The file type can sometimes tell you which program might open the file. If you have GRO files, they are most likely types of Audio Files. A program that works with Audio Files should open GRO files.
Don’t know the file type? You can find it by right-clicking the file and selecting “Properties” or “More Info.” The file type will be listed under “Type of File” or “Kind”.
3. Check with the software developer.
Try contacting the developer of one of the programs mentioned above. They can help you figure out why your GRO file won’t open. Some of the most common developers are listed below.
Software | Developer |
---|---|
Unknown Apple II File | found on Golden Orchard Apple II CD Rom |
Warlords Battlecry Archive | Strategic Studies Group Pty Ltd. |
HP-48/48sx/49 Graphic Object Bitmap | Hewlett-Packard Development Company L.P. |
Genbox Family History Report Options | Thoughtful Creations |
Serious Sam Game File | Croteam Ltd. |
4. Install a universal file viewer.
Universal file viewers can open many different types of files, depending on the format. If your GRO file won’t open, try installing a universal file viewer like File Magic (Download). Some files aren’t compatible with universal file viewers. These files will only open in binary file format.
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1File types that are unsupported can be opened in binary format.