NewTurboCAD 2026.1— the mid-year release is here.See what’s new
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    Support & downloads

    Get your software running again.

    Installers, licence keys, activation problems and the knowledge base — all in one place, whether you bought last week or in 2009.
    START HERE:Find my licence keyMove a licence to a new computerRe-download an installerActivation and ordering FAQs
    Download your installersEvery product on your account, with the link's expiry date and the option to reopen an expired one.Move to a new computerReset the licence yourself and activate again with the same key. Needs active maintenance and support.Find a licence keyYour last three licences, their status, and what each one upgrades to.Renew or upgradePriced from what you already own. Renewing keeps support; upgrading renews it for you.
    Sign in first

    Most of this answers itself

    Sign in and the answers to most of these are already on your account page - you do not need a ticket and you do not need to wait for one.

    Open my account →Move a licence
    Your last three licences

    Product, version and licence key - masked, the way it is printed on your delivery email - with whether support is still running on each.

    What yours upgrades to

    Priced from the licence you actually own, not from list. Where there is a tier above yours, what that costs too.

    Renew support, or don't

    Offered beside the upgrade on anything twelve months old or more. Upgrading renews support for you, so you would not buy both.

    Your download links

    With the date each one expires, and $9.99 to reopen one that already has.

    Move to a new computer

    Reset the licence and activate again with the same key. Needs active maintenance and support, and one reset per twelve months.

    Bought under another email?

    Tell support which address and we attach it, so everything above shows up in one place.

    Download center

    Every installer is tied to the order it came with, so they are on your account page — one for each product you own, older versions included, with the date each link expires. An expired link can be reopened there.

    Open my downloads →Download a free trial

    Bought before you had an account, or under a different email? Ask support to attach the order and it appears on your account.

    Where to start

    Pick your product

    IMSI software goes through rigorous testing cycles; however, hardware and operating system configurations may sometimes cause unexpected software errors or behavior. For help troubleshooting program errors, or for installation assistance, select your brand below to see information and contact options.

    TurboCAD Windows/Mac

    TurboCAD® Windows offers four variants: Platinum, Professional, Deluxe, and Designer. Similarly, TurboCAD® Mac provides options including Mac Platinum, Mac Pro, Mac Deluxe, and Mac Designer. TurboCAD products come with one year of support from the purchase date, which can be renewed annually by upgrading to the latest version.

    TurboCAD supportTurboCAD product page

    DesignCAD

    DesignCAD includes DesignCAD (2D CAD software) and DesignCAD 3D MAX (Both 2D and 3D CAD software). DesignCAD products offer support valid for one year from the date of purchase and can be extended annually by upgrading to current version.

    DesignCAD supportDesignCAD product page

    FloorPlan

    FloorPlan includes the following line of Home & Landscape design software: FloorPlan® Pro, FloorPlan® Deluxe, FloorPlan® Express and FloorPlan® Instant Architect. For FloorPlan® products, IMSI offers support valid for one year from the date of purchase and can be extended annually by upgrading to current version.

    FloorPlan supportFloorPlan product page
    Knowledge base

    The articles people actually open

    ACTIVATIONMoving your licence to a new computerReset it yourself, then activate again with the same key - and what to do when the old machine is already gone.ORDERSI never received my licence key emailCheck spam, confirm the address on the order, then read the key straight off your account page.LICENSINGIs my support still running, and does it matter?What a year of maintenance and support covers, what lapses when it ends, and what renewing costs by edition.

    Founded in 1983, IMSI Design is a leader in feature-rich, yet affordable, general-purpose CAD (Computer Aided Design) and home design desktop software.