We have discovered an error with our updated layer renderer (in iGIS 7.4) that affects large projects with more than 10 layers.
If you have been experiencing crashes when attempting to open a project, it is likely that this is the cause.
We will be submitting a new update to the AppStore to be available as soon as possible.
In the mean time, you may be able to get up and running again by deleting some layers from your project in the project settings menu. You could then create a number of smaller projects.
Once the update has been installed, add the removed layers to your existing project, and you shouldn’t notice any performance degradation or crashing.
We apologise for the inconvenience and appreciate your ongoing support.
The Geometry Team.