Hello Mark,
could you try this?
Go to Step 1 - Settings ---> General Information ---> Content language.
Look for country_code and you should find both this ID content and, immediately below, country_names.
If you double click on the value currently set, it will be selected and you will be able to delete it entirely.
Do this for both country_codes and country_names, and paste the following texts, from [array] to the last country code or country name, in the respective fields.

This is for country_codes:

[array]AF,AL,DZ,AS,AD,AO,AI,AQ,AG,AR,AM,AW,AU,AT,AZ,BS,BH,BD,BB,BY,BE,BZ,BJ,BM,BT,BO,BA,BW,BR,IO,VG,BN,BG,BF,BI,KH,CM,CA,CV,KY,CF,TD,CL,CN,CX,CC,CO,KM,CG,CK,CR,CI,HR,CU,CW,CY,CZ,DK,DJ,DO,DM,TP,EC,EG,SV,GQ,ER,EE,ET,FK,FO,FJ,FI,FX,FR,GF,PF,TF,GA,GM,GE,DE,GH,GI,GR,GL,GD,GP,GU,GT,GW,GN,GY,HT,HN,HK,HU,IS,IN,ID,IR,IQ,IE,IM,IL,IT,JM,JP,JO,KZ,KE,KI,KP,KR,XK,KW,KG,LA,LV,LB,LS,LR,LY,LI,LT,LU,MO,MK,MG,MW,MY,MV,ML,MT,MH,MQ,MR,MU,YT,MX,FM,MD,MC,MN,ME,MS,MA,MZ,MM,NA,NR,NP,AN,NL,NC,NZ,NI,NG,NE,NU,NF,MP,NO,OM,PK,PW,PS,PA,PG,PY,PE,PH,PN,PL,PT,PR,QA,RE,RO,RU,RW,GS,KN,LC,VC,WS,SM,ST,SA,SN,RS,SC,SL,SG,SK,SI,SB,SO,ZA,SS,ES,LK,SH,PM,SD,SR,SJ,SZ,SE,CH,SY,TW,TJ,TZ,TH,TG,TK,TO,TT,TN,TR,TM,TC,TV,UM,UG,UA,AE,GB,US,UY,UZ,VU,VA,VE,VN,VI,WF,EH,YE,ZM,ZW

This is for country_names

[array]Afghanistan,Albania,Algeria,American Samoa,Andorra,Angola,Anguilla,Antarctica,Antigua and Barbuda,Argentina,Armenia,Aruba,Australia,Austria,Azerbaijan,Bahamas,Bahrain,Bangladesh,Barbados,Belarus,Belgium,Belize,Benin,Bermuda,Bhutan,Bolivia,Bosnia and Herzegovina,Botswana,Brazil,British Indian Ocean Territory,British Virgin Islands,Brunei Darussalam,Bulgaria,Burkina Faso,Burundi,Cambodia,Cameroon,Canada,Cape Verde,Cayman Islands,Central African Republic,Chad,Chile,China,Christmas Island,Cocos (Keeling Islands),Colombia,Comoros,Congo,Cook Islands,Costa Rica,Cote D'Ivoire (Ivory Coast),Croatia (Hrvatska),Cuba,Curacao,Cyprus,Czech Republic,Denmark,Djibouti,Dominican Republic,Dominica,East Timor,Ecuador,Egypt,El Salvador,Equatorial Guinea,Eritrea,Estonia,Ethiopia,Falkland Islands (Malvinas),Faroe Islands,Fiji,Finland,France Metropolitan,France,French Guiana,French Polynesia,French Southern Territories,Gabon,Gambia,Georgia,Germany,Ghana,Gibraltar,Greece,Greenland,Grenada,Guadeloupe,Guam,Guatemala,Guinea-Bissau,Guinea,Guyana,Haiti,Honduras,Hong Kong,Hungary,Iceland,India,Indonesia,Iran,Iraq,Ireland,Isle of Man,Israel,Italy,Jamaica,Japan,Jordan,Kazakhstan,Kenya,Kiribati,Korea (North),Korea (South),Kosovo,Kuwait,Kyrgyzstan,Laos,Latvia,Lebanon,Lesotho,Liberia,Libya,Liechtenstein,Lithuania,Luxembourg,Macau,Macedonia,Madagascar,Malawi,Malaysia,Maldives,Mali,Malta,Marshall Islands,Martinique,Mauritania,Mauritius,Mayotte,Mexico,Micronesia,Moldova,Monaco,Mongolia,Montenegro,Montserrat,Morocco,Mozambique,Myanmar,Namibia,Nauru,Nepal,Netherlands Antilles,Netherlands,New Caledonia,New Zealand,Nicaragua,Nigeria,Niger,Niue,Norfolk Island,Northern Mariana Islands,Norway,Oman,Pakistan,Palau,Palestine,Panama,Papua New Guinea,Paraguay,Peru,Philippines,Pitcairn,Poland,Portugal,Puerto Rico,Qatar,Reunion,Romania,Russian Federation,Rwanda,S. Georgia and S. Sandwich Isls.,Saint Kitts and Nevis,Saint Lucia,Saint Vincent and The Grenadines,Samoa,San Marino,Sao Tome and Principe,Saudi Arabia,Senegal,Serbia,Seychelles,Sierra Leone,Singapore,Slovak Republic,Slovenia,Solomon Islands,Somalia,South Africa,South Sudan,Spain,Sri Lanka,St. Helena,St. Pierre and Miquelon,Sudan,Suriname,Svalbard and Jan Mayen Islands,Swaziland,Sweden,Switzerland,Syria,Taiwan,Tajikistan,Tanzania,Thailand,Togo,Tokelau,Tonga,Trinidad and Tobago,Tunisia,Turkey,Turkmenistan,Turks and Caicos Islands,Tuvalu,US Minor Outlying Islands,Uganda,Ukraine,United Arab Emirates,United Kingdom,United States,Uruguay,Uzbekistan,Vanuatu,Vatican City State (Holy See),Venezuela,Vietnam,Virgin Islands (US),Wallis and Futuna Islands,Western Sahara,Yemen,Zambia,Zimbabwe

Please save the project after this, and check if the crash still occurs.

Eric