find your florincoin.conf file (if you're on a mac it should be at ~/Library/Application Support/Florincoin/florincoin.conf, idk where it is on windows, hopefully someone else can fill that detail in if you are)
change
rpcallowip=192.168.0.*
to
rpcallowip=192.168.0.0/16
save and close the file, and then try to open you wallet again
Thanks Blocktechceo- I don't have a folder for florincoin following that path. Is there a way for me to create one?
Is this the wallet you'd sent that TX last year from? If it ever worked (on this computer) then you must have that folder somewhere, it's where your private keys and the blocks are stored. Note that I'm not saying the Library folder in the root level of your hard drive, but the one in your User folder, which MacOSX now hides by default. To get directly to it, pull down the Go menu and select Go to Folder... and then paste this in: ~/Library/Application Support/Florincoin