Ktdenney

I just received this as a gift a few days ago. My husband was able to get it running but whenever I thread the machine when I lower the needle to catch the bottom thread the bobbin casing keeps popping out. I’ve tried to identify the machine all week so I can find a free/cheap manual to go with it. Even if it’s just a download/pdf. The machine has a plate with a model and serial number and also a plate that says it’s made in Korea. As well as Precision built deluxe zig zag. I’ve found a few machines similar but don’t know enough about the older machines to know if those manuals will work. As well as some with similar “badges” but the colors are different. Any help or advice would be greatly appreciated. Thanks in advance!