Yeah, I did that a couple times. Didn't help, unfortunately. :/
The Flatpak works just fine, so I have an effective workaround, but I figured I should bring my problem to someone's attention in case others are having the same problem.
EDIT: I found the logs, figured it would be helpful to post them.
{"level":"info","msg":"Initialising user","pkg":"users","time":"2021-01-31T15:28:12-08:00","user":"FF6GYdXi4ht8OHIJP7sJV0w4EspNsoIMiTuQI_vgbX5G3T8UGf7YxJ4EA05lYUxrRzVA_iJFghI83-RaFL0BFQ=="}
{"error":"account is logged out, use the app to login again","level":"warning","msg":"Could not authorize user","pkg":"users","time":"2021-01-31T15:28:12-08:00","user":"FF6GYdXi4ht8OHIJP7sJV0w4EspNsoIMiTuQI_vgbX5G3T8UGf7YxJ4EA05lYUxrRzVA_iJFghI83-RaFL0BFQ=="}
{"level":"info","msg":"Store database file already exists, using mode already set","pkg":"store","time":"2021-01-31T15:28:12-08:00","user":"FF6GYdXi4ht8OHIJP7sJV0w4EspNsoIMiTuQI_vgbX5G3T8UGf7YxJ4EA05lYUxrRzVA_iJFghI83-RaFL0BFQ=="}
{"level":"info","msg":"Handling unauthorized status","pkg":"pmapi","time":"2021-01-31T15:28:13-08:00","userID":"FF6GYdXi4ht8OHIJP7sJV0w4EspNsoIMiTuQI_vgbX5G3T8UGf7YxJ4EA05lYUxrRzVA_iJFghI83-RaFL0BFQ=="}
{"level":"info","msg":"Handling unauthorized status","pkg":"pmapi","time":"2021-01-31T15:28:13-08:00","userID":"FF6GYdXi4ht8OHIJP7sJV0w4EspNsoIMiTuQI_vgbX5G3T8UGf7YxJ4EA05lYUxrRzVA_iJFghI83-RaFL0BFQ=="}
{"level":"info","msg":"Clearing token","time":"2021-01-31T15:28:13-08:00","userID":"FF6GYdXi4ht8OHIJP7sJV0w4EspNsoIMiTuQI_vgbX5G3T8UGf7YxJ4EA05lYUxrRzVA_iJFghI83-RaFL0BFQ=="}
{"error":"refresh token invalid","level":"warning","msg":"Cannot refresh token","pkg":"pmapi","time":"2021-01-31T15:28:13-08:00","userID":"FF6GYdXi4ht8OHIJP7sJV0w4EspNsoIMiTuQI_vgbX5G3T8UGf7YxJ4EA05lYUxrRzVA_iJFghI83-RaFL0BFQ=="}
{"error":"unauthorized access: refresh token invalid","level":"warning","msg":"Could not list API labels. Trying with local labels.","pkg":"store","time":"2021-01-31T15:28:13-08:00","user":"FF6GYdXi4ht8OHIJP7sJV0w4EspNsoIMiTuQI_vgbX5G3T8UGf7YxJ4EA05lYUxrRzVA_iJFghI83-RaFL0BFQ=="}
{"level":"info","msg":"Autostart /usr/bin/protonmail-bridge","pkg":"frontend-qt","time":"2021-01-31T15:28:13-08:00"}
{"level":"info","msg":"IMAP server listening at 127.0.0.1:1143","pkg":"imap","time":"2021-01-31T15:28:13-08:00"}
{"address":"127.0.0.1:1025","level":"info","msg":"SMTP server is starting","pkg":"smtp","time":"2021-01-31T15:28:13-08:00","useSSL":false}
{"level":"info","msg":"API listening at 127.0.0.1:1043","pkg":"api","time":"2021-01-31T15:28:13-08:00"}
{"level":"warning","msg":"QQmlApplicationEngine failed to load component","pkg":"frontend/qml","time":"2021-01-31T15:28:13-08:00"}
{"level":"warning","msg":"qrc:/ui.qml:31:5: Type MainWindow unavailable","pkg":"frontend/qml","time":"2021-01-31T15:28:13-08:00"}
{"level":"warning","msg":"qrc:/BridgeUI/MainWindow.qml:226:5: Type BubbleNote unavailable","pkg":"frontend/qml","time":"2021-01-31T15:28:13-08:00"}
{"level":"warning","msg":"qrc:/ProtonUI/BubbleNote.qml:117:9: Type ButtonRounded unavailable","pkg":"frontend/qml","time":"2021-01-31T15:28:13-08:00"}
{"level":"warning","msg":"qrc:/ProtonUI/ButtonRounded.qml:22:1: module \"QtGraphicalEffects\" is not installed","pkg":"frontend/qml","time":"2021-01-31T15:28:13-08:00"}
{"level":"error","msg":"Frontend failed with error: QML not loaded properly","pkg":"main","time":"2021-01-31T15:28:13-08:00"}```
