Can’t update PHP and keep powerpress active

I tried to update my site from PHP 5.6 to 7.2 and that shut my site down. When I deactivated plugins, I found that powerpress seems to be the culprit. When I ran the PHP compatibility checker plugin, I got 6 warnings:

FILE: public_html/themixedsix.com/wp-content/plugins/powerpress/getid3/getid3.lib.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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614 | WARNING | INI directive ‘safe_mode’ is deprecated since PHP 5.3 and removed since PHP 5.4
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FILE:/public_html/themixedsix.com/wp-content/plugins/powerpress/getid3/getid3.php
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FOUND 0 ERRORS AND 4 WARNINGS AFFECTING 4 LINES
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146 | WARNING | INI directive ‘safe_mode’ is deprecated since PHP 5.3 and removed since PHP 5.4
150 | WARNING | INI directive ‘mbstring.func_overload’ is deprecated since PHP 7.2
151 | WARNING | INI directive ‘mbstring.func_overload’ is deprecated since PHP 7.2
1352 | WARNING | INI directive ‘safe_mode’ is deprecated since PHP 5.3 and removed since PHP 5.4
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FILE: /public_html/themixedsix.com/wp-content/plugins/powerpress/powerpressadmin.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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3464 | WARNING | INI directive ‘safe_mode’ is deprecated since PHP 5.3 and removed since PHP 5.4
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