I have three linux distros installed on my desktop. They all have Gnucash and Dropbox. They are all connected to the same Dropbox account. I made a change in Gnucash on one of the distros and then later switched to the other two distros. The changes that I made in the one doesn't show up in the Gnucash on the other two distros. All three distros have the same version of Gnucash (5.10). What do I need to do further to solve this problem?