Proficiencies For 5.5 Rogue

According to the rules in 5.5 Rogues get proficiency with any weapons with the finesse property but when coding the site they seem to have given specific weapons rather than anything with the finesse tag. This means I’ve homebrewed a magic Longsword and given it the finesse property but my Rogue player isn’t getting his proficiency bonus added to his attack modifier. Any idea how I can fix this? 

I think the best you can do is manually give the character proficiency with longswords on the character sheet.

That’s annoying but thanks, I’ll see if I can do that