Use one of these Adobe Photoshop, GIMP, Paint.NET, Corel PaintShop Pro, TGA Viewer TGA file extension is a Truevision Graphics Adapter image file. It's also known as a Targa Graphic file, Truevision TGA, or just TARGA, which stands for Truevision Advanced Raster Graphics Adapter.
What are you using to take these images? I can suggest neighborhood's screenshot feature to save as BMP then using your preferred image editor, save as whatever format you wish (PNG for me) Paint.net is a nice tool that supports TGA
For simplicity purposes I would have to agree with this. Also If you are using neighborhood you can use this tool I made. (ignore the error msg, I do not have a kit setup to connect with at the moment, normal operation will display the default console name there and show the screen you just took. If this error occurs your last screenshot will be opened, I know its shotty, but was made many moons ago lol) [GALLERY=media, 2370]Capture by begallegal1 posted Dec 19, 2017 at 3:01 AM[/GALLERY] I use it by pinning it to my taskbar so it only takes one click and I get my screenshot (stores screenshot where exe is stored, connects to default devkit in neighborhood) https://mega.nz/#!leRxiSyJ!hRvUItwgi1-turM9YIl1xtmGGzLYH63TkqBAVhQ0f3k