A few weeks ago, at Google's request, gMaps Pro was pulled from the Windows Phone Marketplace due to a copyright infringement request.
According to the developer Alexey Strakh, gMaps Pro was originally to be hidden from the open Marketplace while the app was re-branded. For some reason (Alexey notes a problem with Microsoft) the app wasn't hidden and eventually pulled. Gmaps was flagged for violating Google's trademarks, something we reported on earlier as other apps had the same problem.
The skinny of it all is that gMaps Pro v1.23 is now available on the Marketplace but upgrades from previous versions are not possible without paying for the updated version. Because it was pulled or deleted from the Marketplace, v1.23 is considered a new app creation and updates to the old versions not possible.
Strakh has suggested for those who had already purchased gMaps Pro before the re-branding complain to Microsoft about having to pay for the app a second time. It's not the best of situations but on has to wonder if Google could offered the new version of gMaps Pro for a limited time as a free app to allow previous owners to upgrade for free?
Nonetheless, gMaps Pro is back on the Marketplace with a free trail version available to let you try things out before buying. The full version is running $1.99 and previous versions are not upgradeable.
You can find gMaps Pro here at the Windows Phone Marketplace.
Source: gMaps Pro (Facebook)
Update: We've just learned that Alexey Strakh is working on offering gMaps Pro v1.23 for free this Friday. We aren't sure if it will be a midnight to midnight offer and once we get all the details, we'll pass them on. If you are a current gMaps Pro user, it may be worth the wait to hold off on updating for a few days.