Since you didn't specify a brand (G13 is a popular model number for keyboards from brands like Tecware, Redragon, and others), and "Rhasta II" sounds like a specific firmware version or a custom keyboard project name, I have written a versatile blog post template.
For MMO and MOBA players, the macro engine is the heart of the keyboard. The Rhasta II software update brings: g13 rhasta ii software upd
Only if you saved the previous firmware (.bin) file. Otherwise, contact support or reflash using a generic firmware flasher (SPI tool). Since you didn't specify a brand (G13 is