Heres the scoop for getting it set up properly:
completely close the bubble client.
go to C:\Users\[USERNAME]\appdata\Roaming\Bubble
create a file: bubble.conf with these contents:
addnode=98.28.193.120
addnode=73.38.41.211:3665
addnode=76.180.145.102:3665
addnode=85.25.199.215:3665
addnode=75.130.163.51:3665
addnode=68.184.180.69:3665
addnode=151.80.42.180:15716
addnode=47.35.228.146:15716
addnode=75.138.192.59:15716
addnode=97.93.29.195:15716
delete anything found in the \appdata\Roaming\Bubble\database folder as well
restart bubble and wait; should sync up.
you could manually add the nodes in the client; but they wont save if the client restarts.... so the .conf file is the best bet. Took me a while to figure that out initially many moons ago when I initially got into BUB.
If it gets stalled at the same percentage for a full day or half a day, delete the contents of the database folder and try again. On one machine it took me multiple tries to get right. The last 1/4 of the syncing takes quite a bit longer... so give it time.. it will happen.
Updated node that IP changed recently; here it is with the instructions for setting up your wallet as well.