There Was An Unhandled Exception Trying To Save Your Rom To Disk Instant

: Relocate both the randomizer and the ROM to a simple directory like C:\Games or your desktop. Avoid system folders like "Program Files" or "Applications" which often have restricted write access.

"There Was an Unhandled Exception Trying to Save Your ROM to Disk": Causes and Fixes : Relocate both the randomizer and the ROM

: The application may not have permission to write to the chosen directory, especially if it's in a protected folder like C:\Program Files : Run the randomizer as an Administrator or move your ROMs and the randomizer folder to your Version Incompatibility : Relocate both the randomizer and the ROM