The first step is to redownload Proloquo2Go. You can redownload purchased apps for free. You can find instructions in the Redownload an App section of https://support.apple.com/en-us/HT201272
Once Proloquo2Go finishes redownloading, open it and follow the prompts to create a new user. From here, you can try to restore a backup.
Going forward, you can prevent apps from being deleted. For more information, see https://support.apple.com/en-us/HT201304
Restore a backup in Dropbox or Google Drive
If you have been backing up to Dropbox or Google Drive, the first step is to give Proloquo2Go access to your account again. There are two ways you can do this:
- If you want Proloquo2Go to upload backups automatically to Dropbox or Google Drive, tap Options* in the bottom toolbar. Then, tap Backup. Toggle the desired service(s) to ON. Proloquo2Go will prompt you to choose which account to link.
- If you want access to stored backups but don’t want to automatically upload them, go to Options > Services. Toggle the desired service(s) to ON. Again, Proloquo2Go will prompt you to choose which account to link.