I am an existing user of Solar (offline) for two company accounts. I am considering upgrading to the online version in order to comply with MTD, however, I only need to do this for one company. Is it possible to upgrade to the online version for 1 company whilst keeping my old offline version for the other company? IE can both versions be installed separately on the same computer? If so, how do I set this up.
Yes, the the offline and online versions of Solar Accounts are completely separate software products, so you can install both and have them running side by side. This page describes how to set up your online account and import one of your existing files:
This page also has more information abut the benefits of switching to the online version: