I am recieving the following install error when trying to upgrade from an older version to the V3 posted on the AppExchange.

Is there no way to upgrade from the old to new version?

Package install error There are problems that prevent this package from being installed.

Problems

Error: Invalid Data.
Review all error messages below to correct your data.

Duplicate RelationshipName Custom Field Definitions The relationship name "R00NR0000000VccFMAS__r" is already used by custom field APTaskTemplate__c.Action_Plan__c. Please rename existing relationship name. Duplicate RelationshipName Custom Field Definitions The relationship name "R00NR0000000VaVDMA0__r" is already used by custom field APTTaskTemplate__c.APTTaskTemplate__c. Please rename existing relationship name. Duplicate RelationshipName Custom Field Definitions The relationship name "R00NR0000000Vd65MAC__r" is already used by custom field APTTaskTemplate__c.User__c. Please rename existing relationship name. Duplicate RelationshipName Custom Field Definitions The relationship name "R00NR0000000VcWbMAK__r" is already used by custom field APTaskTemplate__c.APTaskTemplate__c. Please rename existing relationship name. Duplicate RelationshipName Custom Field Definitions The relationship name "R00NR0000000Vd7NMAS__r" is already used by custom field APTaskTemplate__c.User__c. Please rename existing relationship name. Duplicate RelationshipName Custom Field Definitions The relationship name "Action_Plans__r" is already used by custom field ActionPlan__c.Account__c. Please rename existing relationship name. Duplicate RelationshipName Custom Field Definitions The relationship name "R00NR0000000VbUtMAK__r" is already used by custom field ActionPlan__c.Action_Plan_Template__c. Please rename existing relationship name. Duplicate RelationshipName Custom Field Definitions The relationship name "Action_Plans__r" is already used by custom field ActionPlan__c.Action_Plan__c. Please rename existing relationship name. Duplicate RelationshipName Custom Field Definitions The relationship name "R00NR0000000VZZ8MAO__r" is already used by custom field ActionPlan__c.Contact__c. Please rename existing relationship name. Duplicate RelationshipName Custom Field Definitions The relationship name "R00NR0000000VZZDMA4__r" is already used by custom field ActionPlan__c.Lead__c. Please rename existing relationship name. Duplicate RelationshipName Custom Field Definitions The relationship name "R00NR0000000VZZIMA4__r" is already used by custom field ActionPlan__c.Opportunity__c. Please rename existing relationship name.

Receiving the following errors when trying to update from v. 1.25 to v. 3. What are the proper steps to upgrading versions?

I installed Action Plans and got it set up for one of my custom objects. However, when I marked off a task, it was creating two dependant tasks. I looked at the debug log and it turns out that I had a field update on the task object which was causing the task trigger to run again, creating a second dependant task.

Luckily, I just had this problem with some other apex code, so here's what I did:

In the ActionPlansTaskTriggerUtilities class I added:

public static boolean firstTrigger = true;

In the ActionPlanTaskTrigger I wrapped everything inside of an if statement:

if(    ActionPlansTaskTriggerUtilities.firstTrigger == true){
        ActionPlansTaskTriggerUtilities.firstTrigger = false;
      // Existing code went here
}

This appears to be working correctly. Let me know if this will mess anything else up.