We are recommending that all clients become current to the latest version of MAS 90 or MAS 200 within a reasonable time of about a year. Over the next month we will be in touch with our existing clients to discuss the upgrade process.
As we've previously noted only version 4.3 and 4.4 of Sage MAS 90 and 200 will be Windows 7 compatible.
While older versions of MAS 90 or 200 might work under Windows 7 - we don't believe the risk of future incompatibility is a wise risk to assume.
There are also numerous upgrade benefits for nearly all users (expanded customer accounts and inventory item numbers are the early favorites).